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Cross-cultural adaptation and validation of the Arabic version of the Physical Activity Scale for the Elderly among community-dwelling older adults in Saudi Arabia

Authors Alqarni AM, Vennu V, Alshammari SA, Bindawas SM

Received 14 November 2017

Accepted for publication 13 February 2018

Published 19 March 2018 Volume 2018:13 Pages 419—427

DOI https://doi.org/10.2147/CIA.S157007

Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 3

Editor who approved publication: Dr Richard Walker

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Ayidh M Alqarni,1,2 Vishal Vennu,1 Sulaiman A Alshammari,3 Saad M Bindawas1

1Department of Rehabilitation Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia; 2Department of Physical Therapy, King Abdullah Hospital, Bisha, Saudi Arabia; 3Department of Family and Community Medicine, College of Medicine, King Saud University, Riyadh, Saudi Arabia

Purpose: Older adults are the fastest growing population group worldwide. Regular physical activity (PA) is reported to reduce the risk of health conditions and improve personal well-being. Few validated instruments can be used to measure the PA levels among older adults in Saudi Arabia. The Physical Activity Scale for the Elderly (PASE) is used worldwide for evaluating the PA levels of the elderly in epidemiological studies. However, this scale has not been translated into Arabic. This study aimed to cross-culturally adapt the PASE into Arabic language and evaluate its reliability and validity among community-dwelling older adults in Saudi Arabia.
Patients and methods: This study was a cross-sectional one following Beaton guidelines to translate and perform cultural adaptation, as well as test the reliability and validity of the PASE Arabic version (PASE-A). Elderly (N=74) people from both genders, who lived in a community dwelling in Riyadh city, were selected from several primary health care centers. The study used Cronbach’s alpha coefficient to assess the internal consistency reliability, while intraclass correlation coefficient (ICC2,1) was used for test–retest reliability and the Spearman’s rank correlation coefficient (r) was used to evaluate the correlation among PASE-A and grip strength, Timed Up and Go test, body mass index, and fat percentage.
Results:
Out of 74 older adults, 59 (79.7%) completed the PASE-A questionnaire twice. The internal consistency of the PASE-A components was good (Cronbach’s alpha 0.70–0.75), and the reliability of the components was excellent (ICC2,1 0.90–0.98). A higher PASE-A score was associated with higher grip strength (r=0.28, p=0.05) and with shorter Timed Up and Go test times (r=-0.45, p=0.01).
Conclusion: The PASE-A version was easy, understandable, and relevant for Saudi older adults’ culture. This scale was a reliable and valid tool for evaluating and assessing the PA level among community-dwelling older adults in Saudi Arabia.

Keywords: physical activity, elderly, psychometric, PASE, Saudi Arabia, reliability, cross-sectional study, psychometric

Introduction

Older adults form a substantial and rapidly growing segment of the population globally,1 including the Arab world,2 especially in Saudi Arabia.3 The number of older adults worldwide is predicted to increase by 300% between 2000 and 2025, reaching its highest level in the Arab world by 2050.1,2 In 2014, the United Nations predicted that the older population of Saudi Arabia would continue to increase to be 18.4% of the total population by 2050.4 This suggests that there is a continuous growth of older people in Saudi Arabia due to the increase in life expectancy and decline in fertility rates.2 There are few high-quality data on the physical activity (PA) levels in older adults in the Arab world,5 including Saudi Arabia.3

Regular PA is widely considered to reduce the risk of many health conditions and contribute toward personal well-being.6 According to the World Health Organization, physical inactivity was the fourth leading risk factor for mortality and accounted for 6% of all deaths globally.7 In addition, physical inactivity is a leading cause of age-associated disorders,8,9 such as coronary artery disease, stroke, diabetes mellitus, hypertension, obesity, and low skeletal muscle mass.

There is limited availability of validated instruments that can be used to measure PA levels of elderly individuals in Saudi Arabia. Questionnaires are considered the best way to do this because they are easy to administer and cost-efficient.10 Instruments used to conduct epidemiological surveys of the elderly should include low-intensity (housework) and leisure (sport, recreation) activities;11 there are several questionnaires specifically designed for the elderly population that are used by many countries, including the Yale Physical Activity Survey,12 the Modified Baecke Questionnaire for older adults,13 the Zutphen Physical Activity Questionnaire,14 the Longitudinal Aging Study Amsterdam Physical Activity Questionnaire,15 and the Physical Activity Scale for the Elderly (PASE).16 These measures differ in their intended purpose, suitability for different populations, and ability to assess the critical dimensions of PA (frequency, intensity, and time) in older adults.1719

The PASE was selected for adaptation into Arabic due to the following reasons: 1) it is used worldwide for evaluating the PA levels of elderly people in epidemiological studies; 2) low-intensity activities are included (eg, housework); 3) it can be completed in 5–15 minutes; 4) the recall timeframe is not extended (“the last 7 days”); and 5) it can be self- or interviewer-administered. This scale was developed by the New England Research Institute (NERI) and introduced by Washburn et al.16 It consists of a 12-item questionnaire addressing strength and endurance exercise, sports activities, job activities, walking, yard work, care for other people, household activities, and outdoor gardening over the past 7 days. This scale has been translated and validated in different languages, including Dutch,20 Norwegian,21 Japanese,22 Korean,23 Chinese,24 Chinese-Taiwan,25 German,26 Turkish,27 and Malay.28

Objective

The purpose of this study was to cross-culturally adapt the PASE into Arabic language and evaluate its reliability and validity among community-dwelling older adults in Saudi Arabia.

Patients and methods

Translation process

A license agreement from the NERI (the copyright owner) was obtained to use the original PASE questionnaire for translation into the Arabic language. The PASE Arabic version (PASE-A) was translated into six stages (Figure 1), as recommended by the guidelines published by Beaton et al.29

Figure 1 Flowchart of the translation and cross-cultural adaptation process of PASE-A from the original English version.
Abbreviations: PASE, Physical Activity Scale for the Elderly; PASE-A, Arabic version of the Physical Activity Scale for the Elderly.

During stage I, forward translation from English into Arabic was completed independently by two bilingual, native Arabic speakers with an excellent understanding of English. One translator was a physiotherapist and the other was a professional translator. A written report for each translated version with translators’ comments and the rationale for choices for problematic questions were submitted to an expert committee (see the description of stage IV in the following section).

During stage II, the two translated documents were synthesized into one Arabic version after resolution of all discrepancies between translators. A written report for the integrated version was also submitted to the expert committee.

For stage III, back-translation of the synthesized Arabic version into English was completed separately by two native English speakers, with each of them submitting a report to the expert committee.

During stage IV, an expert committee, consisting of four experts in research methodology, language translation, geriatrics, and rehabilitation, was formed to evaluate all the translated versions and review all submitted written reports. After evaluation and review, the committee reached a consensus on all discrepancies, and a prefinal version of PASE-A was formulated.

For stage V, the prefinal version was tested on a sample of 30 community-dwelling older adults (mean age: 65.7 years, SD 8.8) to ensure that all of the contents could be understood. Issues were encountered relating to wording, clarity, and relevance to aid cultural understanding; several items were modified in the translated version. Under leisure time activity, item two, “walking the dog” was changed to “walking to the mosque”; under item three, some examples such as “bowling”, “golf with a cart”, “shuffleboard”, and “fishing from a boat” were replaced with “shooting”, “bowling”, “billiards”, and “simple care for pet animals”, respectively; item four “ballroom dancing” was modified to “folk dancing with slow movement”, and “ice skating”, “golf without a cart”, and “softball” were replaced with “grazing sheep or camels”, respectively; and under item five, some examples such as “single tennis” and “skiing downhill or cross-country” were removed, and “aerobic dance” was modified to “folk dancing with high movement”. Under household activity the examples at item nine − regarding lawn work or yard care – “snow removal” was replaced with “dusting or washing dust”, and “wood chopping” was removed. Under work-related activity, units of weight were changed from pounds to kilograms. As the PASE-A version consists of only 12 items, 30 patients were considered sufficient for validation.29 As part of stage VI, all translated versions were sent to the developer (NERI) for approval of the final PASE-A version.

Study design

A cross-sectional study was designed to evaluate the psychometric properties of the PASE-A version among community-dwelling older adults living in Riyadh, Saudi Arabia. The sample (N=74) was selected from different primary health care centers (PHCCs) across Riyadh, Saudi Arabia. PHCCs provide vital health care at the first level and aim to enhance an individual’s health status by providing preventive and curative services.30

Participants

To enroll in this study, the study investigator called potential participants through a telephone after collecting their details from the PHCCs. Participants who accepted the invitation were informed about the purposes and procedures of the study before enrollment. Both men and women aged 60 years and above, who were independent in daily living and able to read and understand basic Arabic language were included. Individuals with severe pain or severe hearing or vision problems, with a diagnosis of Alzheimer’s disease, a history of stroke in the past 2 years, uncontrolled cardiovascular disease, a documented cognitive disorder, or physical disability that could interfere or have an effect on data were excluded.

Ethics approval and informed consent

The Research Ethics Committee and the Institutional Review Board at the following institutions authorized this study: College of Applied Medical Sciences and King Fahad Medical City (No: 17-004E). All participants gave written informed consent before participation. The participants were enrolled according to the quality criteria described by Terwee et al.31

Data collection

In the first week, all participants’ demographic data, such as age, gender, education, occupation, a region in which the person was living, morbidity, and body mass index (BMI), were collected. Next, we asked all of them to complete the PASE-A questionnaire twice within a 1-week interval. Physical assessments, such as grip strength, the Timed Up and Go (TUG) test, BMI, and body composition (BC), were also completed for all participants.

Measures

The PASE-A questionnaire is are designed to measure self-reported PA among older adults in three domains (leisure, household, and work-related activities) over the preceding 7 days.16 This scaled score was calculated as the sum of the products of the time spent on an activity and the weighting of the activity (calculated separately for the 12 types of activities). For leisure activities, respondents were asked to respond to two ordinal ranked questions: frequency (1=never to 4=often) and duration (<1 to >4 hours). Household and work-related activities were asked as categorical “yes or no” questions. Those who answered “yes” to a specific activity had a prespecified weight added to their score, while those who answered “no” received a score of zero for that question. Scale scores were calculated from weights and frequency values for all 12 items. Multiplying the activity weight by the activity frequency for every single item. Then, summing the (weight time frequency) for all 12 items to give the overall PASE score.

Grip strength of the dominant hand was measured three times in the standing position using a Jamar® hydraulic hand dynamometer (Patterson Corporation, Jackson, MI, USA). The mean of the three results was selected for the analysis. The Jamar hydraulic hand dynamometer has been shown to be a reliable and valid way to measure grip strength in older adults.32

In the TUG test, each participant was asked to rise from an armchair (seat height 49 cm), walk 3 m, turn around (180°), and sit back down in the chair.33 The time was recorded in seconds using a stopwatch. One practice trial was performed, and assistive devices were allowed. TUG has been shown to be reliable and valid to measure balance, functional mobility, and fall risk in older adults.34

BMI was calculated by dividing the weight in kilograms by the square of the height in meters. Measures of BC, such as fat percentage (FP), fat-free mass (FFM), fat mass (FM), total body water (TBW), and muscle mass (MM), were analyzed using the Bioelectrical Impedance Analysis device (BC-418MA, BC Analyzer; Tanita, Tokyo, Japan).35

Psychometric assessments and statistical analysis

All participants’ demographic data were presented as counts (percentage) or mean and SD, as appropriate. Cronbach’s alpha was used to determine internal consistency. Alpha values from 0.70 to 0.95 were considered good to excellent.36 Test–retest reliability was determined using intraclass correlation coefficient (ICC2,1). An ICC value equivalent to or >0.70 indicated a good level of reliability.37 A 1-week time interval was selected as it was short enough to ensure participants could not change their PA level and long enough to prevent recall bias.38 Absolute reliability was analyzed both by the standard error of measure (SEM) and the minimal detectable change (MDC). SEM was determined as the SD of the first test session scores × square root (1–ICC2,1). MDC was determined as MDC=SEM×1.96×v2, where 1.96 was derived from the 0.95% CI. SEM represents the smallest change that indicates a real difference for a group of subjects, while MDC shows the smallest change that indicates a real improvement for a single subject.39,40

Construct validity of PASE-A (total score, subscale, and item-by-item) was evaluated using Spearman’s rank correlation coefficients (r), with grip strength, TUG, BMI, BC, sociodemographic variables (age, education level, and occupational status), pain level, and morbidity. Coefficient values >0.75 and 0.25–0.75 were considered good to excellent and fair to good, respectively. Statistical analyses were performed using statistical analysis software version 9.3 (SAS Institute, Cary, NC, USA) and Microsoft® Excel (Microsoft Corp., Redmond, WA, USA).

Results

Participant’s characteristics

In total, 74 older adults (41 men and 33 women) participated in the validation of the PASE-A. Among them, 59 (79.7%) older adults (31 men and 28 women) completed the PASE questionnaire twice. The participants’ demographic and clinical characteristics are summarized in Table 1. The mean age of the study participants was 65.0±7.1 years; most of them (55%) were men. The majority of the participants had a primary school or lesser education (64.9%) and one or more morbidities (80%). A high proportion of the participants were from the northern region of Riyadh (33.8%). However, the mean total PASE-A score was 111.7±77.7. The total PASE-A score was significantly (p<0.0001) higher among men (116.9±75.8) compared to women (105.2±80.8; data not shown).

Table 1 Participants’ demographic and clinical characteristics
Note: Values are presented in mean±SD or count (percentage).
Abbreviation: BMI, body mass index.

Reliability

PASE-A components were found to have adequate test–retest reliablility, or the ICC between attempts was strong, indicating test–retest reliability ranged from 0.90 to 0.98. Absolute reliability showed that the measurement error at the group level (SEM) was 3.3–8.5. The measurement error at the individual level (MDC) was 9.0–23.6. The internal consistency of the PASE-A components was good, with Cronbach’s alpha ranging from 0.70 to 0.75. The internal consistency of the “lawn work or yard care” item was fair; the Cronbach’s alpha was 0.69 (Table 2).

Table 2 Score distribution of the two assessmentsa with the results of the reliability analyses of internal consistency
Note: aTwo assessments, separated by a 1-week interval.
Abbreviations: ICC, intraclass correlation coefficient (two-way model, single measure); MDC95, minimal detectable change from the 95% CI level; PASE-A, Arabic version of the Physical Activity Scale for the Elderly; SEM, standard error of measurement.

Construct validity

Table 3 presents the correlation between the total PASE-A score, its components, and validation measures. The total PASE-A score was moderately correlated with grip strength (r=0.288, p<0.05) and shorter TUG (r=−0.451, p<0.01). A higher leisure time activity score was moderately correlated with higher grip strength (r=0.443, p<0.01), higher FFM (r=0.282, p<0.05), higher TBW percentage (r=0.258, p<0.05), higher MM (r=0.290, p<0.05), and reduced FP (r=−0.258, p<0.05). A higher leisure time activity score was moderately correlated with shorter TUG (r=−0.442, p<0.01). A higher household activity score was moderately correlated (p<0.05) with a higher BMI (r=0.290), higher FP (r=0.304, p<0.01), and higher FM (r=0.278, p<0.01), as well as with shorter TUG (r=−0.272, p<0.05) and lower TBW (r=−0.307, p<0.01). A higher work-related activity score was moderately correlated (p<0.01) with higher FFM (r=0.311), higher MM (r=0.312), and with shorter TUG (r=−0.282, p<0.05).

Table 3 Correlations between the PASE-A version and validation measures
Notes: Bold values indicate statistically significant at *p<0.05 and **p<0.01.
Abbreviations: BMI, body mass index; FFM, fat-free mass; PASE, Physical Activity Scale for the Elderly; PASE-A, Arabic version of the Physical Activity Scale for the Elderly; TBW, total body water; TUG, the Timed Up and Go test.

Correlations between each item of the PASE-A and the validated measures are shown in Table 4. The table shows moderate correlation (p<0.01 or p<0.05) between some items (2, 5, 7, 8, and 9d) and validation measures such as grip strength, BMI, and FP. A few items such as 2, 4, 9a, and 10 were moderately correlated (p<0.01 or p<0.05) with shorter TUG.

Table 4 Correlation between the PASE-A version items and validation measures
Notes: Item #2, walk outside home; item #3, light sport; item #4 moderate sport; item #5, strenuous sport; item #6, muscle strength/endurance exercise; item #7, light housework; item #8, heavy housework or chores; item #9a, home repairs; item #9b, lawn work or yard care; item #9c, outdoor gardening; item #9d, caring for another person; item #10, work for pay or as a volunteer. Bold values indicate statistically significant at *p<0.05 and **p<0.01.
Abbreviations: BMI, body mass index; PASE-A, Arabic version of the Physical Activity Scale for the Elderly; TUG, Timed Up and Go test.

Correlations of the total PASE-A and its subscales with sociodemographic variables, pain levels, and morbidity are presented in Table 5. The total PASE-A was moderately correlated with age (r=−0.246, p<0.05), pain (r=−0.252, p<0.05), and morbidity (r=−0.325, p<0.01). The PASE-A subscale of leisure time activity was moderately correlated with morbidity (r=−0.277, p<0.05), while household activity was moderately correlated (both p<0.05) with age (r=− 0.230) and morbidity (r=−0.292). The subscale work-related activity was moderately correlated (both p<0.05) with education (r=0.262) and pain (r=−0.230), while it was strongly correlated with occupation (r=0.536, p<0.01).

Table 5 Correlations between the PASE-A, sociodemographic variables, pain, and morbidity
Notes: Bold values indicate statistically significant at *p<0.05 and **p<0.01.
Abbreviations: PASE, Physical Activity Scale for the Elderly; PASE-A, Arabic version of the Physical Activity Scale for the Elderly.

Discussion

The current study used six stages recommended by Beaton guidelines to cross-culturally adapt the PASE into Arabic language and evaluate its psychometric properties with Arabic-speaking, community-dwelling older adults living in Riyadh, Saudi Arabia. The study’s findings suggest that the PASE-A version was easy, understandable, and relevant for Saudi older adults’ culture. This scale is a reliable and valid tool for evaluating and assessing the PA level among community-dwelling older adults in Saudi Arabia.

In this study, there were no difficulties experienced during translation. A recommended standard guideline was used for cultural adaptation to ensure the quality and equivalence of the PASE-A to the source material. In the adapted version, some of the items and examples were modified because of the Saudi Arabian cultural context, including its environment and elderly activities. For example, “walking the dog” and “wood chopping” did not overlap with habitual responsibilities or activities of elderly people in Saudi Arabia. Furthermore, “ice skating” and “snow removal” were modified because it does not snow in the country. The example of “golf without a cart, softball” was replaced with “grazing sheep or camels” because this example is a recreational habit of some older adults in Saudi Arabia. All modified or replaced examples were verified to match up with the extra examples provided by Ainsworth et al.41

The mean PASE-A score for older adults in this study was 111.7±77.7. This is slightly higher than in previous studies conducted in the USA (102.9±61.1)16 and China (104.4±47.1),24 but is somewhat lower than in a study conducted in Japan (114.9±44.9).22 The internal consistency of the PASE-A components was good and comparable to the results reported in the original,16 as well as the Norwegian version,21 where it was tested among community-dwelling older adults (aged 67 years or older). However, the internal consistency of the PASE-A components and its items was somewhat higher than the source version.16 It is to be noted that this study evaluated the internal consistency of the PASE-A components and its items.

The test–retest reliability of the total PASE-A and its components was higher than the original,16 Japanese,22 Chinese,24 Chinese-Taiwanese,25 German,26 and Malay versions,28 but lower than the Norwegian version.21 To the best of our knowledge, few studies have examined the absolute reliability of the PASE.26,42,43 However, PASE scores for healthy community-dwelling older adults have not been previously reported. The SEM and MDC values suggest reasonably high inter-test precision for sensitivity to individual or group differences in longitudinal studies.

Correlation analysis was used to construct validity between the PASE-A components, items, and validation measures. Correlation between the PASE-A questionnaires and validation measures was fair (r=0.25–0.75). These findings were similar to those demonstrated in previous studies. For example, the correlations between grip strength and PASE scores for the original (r=0.37), Chinese (r=0.40),24 Malay (r=0.33),28 and Korean versions23 (r=0.25) all fall in the “fair” range.

Our study found the total PASE-A score was inversely associated with the TUG. Our results suggest that PA levels decrease with increases in TUG for older adults. This inverse association was found in an assessment of the Chinese version,24 but using a different test (dynamic balance test). Meanwhile, the original version16 found a positive association with a static balance test, suggesting that PA levels increase with increased static balance. These findings support the World Health Organization guidelines that promote the participation of older adults in regular PA to enhance stability and prevent falls and reduce the risk of falls.7

In this study, there was no correlation found between the total PASE-A score, BMI, FP, and other BC, which is similar to the original,16 Malay,28 and Chinese versions.24 Moreover, item three was not correlated with any of the validation measures. It may be that most of the participants, especially women, were not engaged enough in light sports activities. Also, item six had a few correlations due to the small numbers of enrollments involved in a light household activity, especially from the male side. However, positive associations were found between household activity, BMI, FP, and FM. These correlations may be due to participants spending more time at home doing light household activities.44

One of the most interesting findings of this study was that the PASE-A score was negatively associated with age, pain, and morbidity. This inverse correlation is similar to the literature, suggesting that age, pain, and morbidity may alter the PA levels among older adults.4547 Thus, addressing the relationship between pain, morbidity, and PA levels among older adults is warranted in further investigation.

Limitations of this study must be considered. A small sample size from the PHCCs across Riyadh might limit the generalizability of the study findings. Also, additional explanation may be needed about the intensity of sports and recreational activities, which may have introduced some bias. In our study, we used both self-reported and interviewer-administered in-person interview methods to collect data and the agreement between them has not been tested yet. Finally, the translated version used classic Arabic; some terms may vary because of differences in the dialects of the Arabic language between regions of the country as well as between nations.

Strengths of this study are that it included an adequate sample of community-dwelling older adults, consistent with previous literature,16,22,24 and had high response rate (79.7%) on the second assessment. Translation and cultural adaptation were performed according to the standard guidelines.29 Objective measures were used in validation of the PASE-A. Finally, the PASE-A questionnaire was specially designed to study PA levels among older adults in Saudi Arabia, which were not available previously.

This study showed that the PASE-A is a reliable and valid questionnaire that enables researchers to estimate PA levels among community-dwelling older adults in Saudi Arabia. The adapted questionnaire also allows clinicians to design an adequate PA program for individuals with low PA levels. Moreover, researchers, policymakers, and stakeholders should consider the PASE-A version because of its low cost, the short time required to complete it, and its suitability to Saudi culture, environment, and elderly activities. By recommendations from a systematic review of the literature,48 our new PASE-A questionnaire addresses the PA levels among older adults in Saudi Arabia because the questionnaire items were carefully developed and are most appropriate to address older adults’ activities and participation.

Conclusion

The PASE-A was a well-accepted, reliable, and valid tool for evaluating and assessing the PA levels among community-dwelling older adults in Saudi Arabia. Further studies are needed to investigate the use of the PASE-A in other Arab countries to determine the validity of their older individuals. More extensive studies of PASE-A are necessary to develop normative PA data among Saudi older adults because a reliable and valid assessment of PA levels in older adults is an essential area of research.

Acknowledgments

The authors extend their appreciation to the Research Centre, College of Applied Medical Sciences, and the Deanship of Scientific Research at King Saud University for funding this research.

Disclosure

The authors report no conflicts of interest in this work.


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