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Timed Up and Go Test can predict recurrent falls: a longitudinal study of the community-dwelling elderly in China

Authors Kang L, Han P, Wang J, Ma Y, Jia L, Fu L, Yu H, Chen X, Niu K, Guo Q

Received 29 March 2017

Accepted for publication 18 June 2017

Published 28 November 2017 Volume 2017:12 Pages 2009—2016


Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Akshita Wason

Peer reviewer comments 2

Editor who approved publication: Dr Zhi-Ying Wu

Li Kang,1,2 Peipei Han,2 Jiazhong Wang,2 Yixuan Ma,2 Liye Jia,2 Liyuan Fu,2 Hairui Yu,2 Xiaoyu Chen,2 Kaijun Niu,3,4 Qi Guo1,2

1Department of Rehabilitation Medicine, Tianjin Economic-Technological Development Area International Cardiovascular Hospital, Cardiovascular Clinical College of Tianjin Medical University, 2Department of Rehabilitation Medicine, 3Nutritional Epidemiology Institute, 4School of Public Health, Tianjin Medical University, Tianjin, China

Purpose: Falling is a major health problem in community-dwelling elderly individuals. The aim of the present study was to conduct a prospective investigation to evaluate the accuracy of the Timed Up and Go Test (TUGT), 4-meter walking test, and grip strength test to screen for the risk of falls and to determine a cutoff point to be used clinically.
Patients and methods: This was a prospective study that included 541 participants. The fall data were obtained via face-to-face interview, and the date, site, and circumstances of any falls were recorded. TUGTs were recorded as part of a comprehensive geriatric assessment. We collected the same data at baseline and after follow-up via comprehensive geriatric assessment.
Results: The incidence of falls of our study subjects was 20.8%. The recurrent-fall group had a fall rate of 6.8% during the follow-up year. The standard area under the curve (AUC) of our screening tool was >0.70, and hence our tool can be used for clinical purposes. After adjusting for age and gender, the AUC of TUGT became 0.642, so it cannot be used as a predictive tool for measuring any types of falls. However, when recurrent falls were adjusted for age and gender, the TUGT’s AUC improved to 0.733 and a score of 15.96 seconds is used as a cut-point to screen recurrent falls in community-dwelling elderly Chinese individuals.
Conclusion: Future falls were best predicted by TUGT in recurrent fallers at baseline. A score of 15.96 seconds is used as a cut-point to screen recurrent falls in community-dwelling elderly Chinese individuals.

community dwelling, elderly, fall, TUGT


Falls are a major problem for elderly people. Approximately 30% of the population aged ≥65 years fall each year and this percentage rises to 50% in people >80 years old.1 Currently, in China more than 14.3% of the population is ≥60 years and is expected to increase to 34% in 2050.2 As age increases, muscle mass and strength gradually decline, leading to diminished physical performance,3 which leads to a high risk of falls and subsequent fractures, loss of independence, and increased morbidity and mortality rates.4,5

Gait instability has been identified as a risk factor for falls and the majority of screening programs to identify those at risk of falls comprise an assessment of gait and balance.6 Recently, the Timed Up and Go Test (TUGT) has been recommended to assess gait and balance and it has been validated as an appropriate method for evaluating elderly individuals’ risk of falling.7 However, the literature on its predictive value and diagnostic accuracy for identifying future falls is not straightforward. One systematic review showed that although retrospective studies found that the TUGT time performance is associated with a past history of falls, its predictive ability for future falls remains limited.8 Additionally, while there is currently no uniform cutoff point for elderly Chinese individuals, another systematic review demonstrated that the diagnostic accuracy of the TUGT is limited to the widely used cutoff point of ≥13.5 seconds, which should not be used clinically to identify community-dwelling adults at a high risk for falls.9

Although there have been large-scale clinical trials demonstrating the effectiveness of the TUGT for assessing risk of falls, data on the TUGT’s value in the Chinese population are sparse. The results of the TUGT can vary due to race10 and population characteristics, eg, community-dwelling versus institutionalized elderly women.11 Currently, there are no recommended cutoff points for different Chinese community-dwelling adults.12 At present, more than 70% of the elderly Chinese individuals live in suburban areas.13 The current study population is a part of this group, most of whom are farmers (ie, working in the fields) who have not completed a high level of education and have less health care access. Therefore, the aim of the present study was to conduct a prospective investigation to evaluate the accuracy of TUGT, 4-meter walking test, and grip strength test to screen for the risk of falls and to determine a cutoff point to be used clinically among community-dwelling elderly Chinese individuals, specifically in suburban-dwelling elderly populations.

Patients and methods


Our study population comprised residents of the township central hospital of Chadian, in the suburban Hangu of Tianjin, China. They were aged ≥60 years and had joined the China’s national free physical examination programs. The participants were fully informed of the nature of research and signed an informed consent to participate. Subjects participated from March 2013 at baseline and from March 2014 at follow-up. All subjects were invited to participate in a comprehensive geriatric assessment. A total of 669 subjects were included in the follow-up group. The exclusion criteria were as follows: 1) inability to perform the basic activities of daily living and thus could not complete performance-based assessments; 2) visual impairments (ie, glaucoma, cataracts, and myopia and presbyopia that were not adequately corrected) that interfered with their daily activities; and 3) current use of drugs (psychotropic drugs, cardiovascular drugs, hypoglycemic agents, non-steroidal anti-inflammatory drugs, analgesics, dopaminergic drugs, Parkinson’s disease drugs, or more than four kinds of complex drugs). During the 1-year follow-up, there were missing data on 125 people, one person passed away, and two were unable to complete the assessment. A total of 541 people (age range: 60–86 years) completed the follow-up. This research was approved by the Ethics Committee at Tianjin Medical University.

Comprehensive geriatric assessment

The comprehensive assessment included a questionnaire, physical performance tests, and a grip strength measurement.

Demographic, behavior performance, and dates of physical illness were obtained via face-to-face interview.14 Demographic variables, including age, gender, living status (alone or with another person), and educational level were assessed. A history of physical illness was obtained on the basis of participants’ responses (yes or no) to questions about hypertension, hyperlipidemia, stroke, coronary heart disease, and kidney disease, including physician diagnosis, as well as about taking corresponding medication or other treatment now or in the past. Information on smoking (“not currently smoking” and “currently smoking”) and drinking (“not currently drinking” and “currently drinking”) statuses was also obtained from the questionnaire. Height and weight were recorded using a standard protocol. Body mass index was calculated as weight in kilograms divided by height in meters squared. The Geriatric Depression Scale was used to evaluate depressive symptoms, where participants with a score of ≥11 were considered to have depressive symptoms.15 Physical activity level was measured by the average number of hours per day spent in leisure, household, and occupational physical activities over the previous 7-day period, using the short form of the International Physical Activity Questionnaire (IPAQ), in the Chinese language.16 Responses were converted to metabolic equivalent task minutes per week (MET-min/week) according to the IPAQ scoring protocol: total minutes over the previous 7 days spent on vigorous activity, moderate-intensity activity, and walking were multiplied by 8.0, 4.0, and 3.3, respectively, to create MET scores for each activity level. MET scores across the three subcategories were summed to indicate overall physical activity.17 Gait function was assessed with the 4-meter walk tests. Participants were instructed to stand with both feet touching the starting line and to begin walking at their usual pace after a verbal command. The time between the activation of the first and second photocells was recorded. The average time of two trials was used to compute walking speed. The participants were allowed to use a gait-assistance device.18 Grip strength (kg) was used as a measure of muscle strength and was quantified using a handheld dynamometer (GRIP-D; Takei Ltd, Niigata, Japan). Participants were asked to exert their maximum effort twice using their dominant hand and the average grip strength used was recorded.19


The TUGT assesses the number of seconds needed for an individual to stand up from a chair, walk 3 meter at their usual pace past a line on the floor, turn around, walk back to the chair, and sit down again with the back against the chair.20


A fall is defined as an event that results in a person coming to rest unintentionally on the ground or other lower level, and the fall not being caused by a violent blow, loss of consciousness, sudden onset paralysis, or epileptic seizure.21 The fall data were obtained via face-to-face questioning, and the date, site, and circumstances of any falls at the baseline and after a year of follow-up were recorded. The study population was divided into three groups based on whether they fell zero, one, or two or more times during the 1-year follow-up (no-fall group, one-fall group, and recurrent-fall group, respectively).

Statistical analyses

Differences between variables were examined by one-way ANOVAs with a Bonferroni correction (continuous variables) or by chi-squared test (categorical variables). Continuous variables were expressed as mean ± SD and categorical variables as an absolute number and percentage (%) of the total. Cox regression analyses were used to examine the relationships between adjusted variables and falls. This analysis was conducted as a subgroup analysis that was stratified according to the times of falling (any and recurrent). Predictive values of the absolute cutoffs of baseline measures of the TUGT, 4-meter walking test, and grip strength test for one or more future falls and recurrent (>1) falls were calculated as the areas under the curve (AUCs) of the receiver operating characteristic (ROC) curves. ROC curves were constructed to analyze sensitivity and specificity, and Bootstrap was used to calculate the AUC confidence intervals. The sensitivity of a test describes how well it correctly identifies subjects with a condition of interest, whereas specificity indicates the frequency that the test is negative in the absence of a condition of interest.22 We use logical regression to build models for fall risk, with any fallers or recurrent fallers as the dependent variables, included the TUGT, 4-meter walking test, and grip strength as the predictors, age and gender were independent variables in the models. Two-tailed P-values <0.05 were considered statistically significant. To build a clinical approach to prevent recurrent falls among elderly individuals living in the community, two cutoffs were discussed: the cutoff maximizing the Youden index and the cutoff maximizing the sum of the positive predictive value (PPV) and negative predictive value (NPV). All statistical analyses were performed with SPSS V17.0 software package (SPSS Inc, Chicago, IL, USA).


All the 541 subjects completed the TUGT assessment and other tests at the follow-up of 1 year. A total of 113 people fell; 76 subjects (14%) belonged to the one-fall group and 37 subjects (6%) to the recurrent-fall group.

Characteristic of the study population

The baseline characteristics of population are reported in Table 1. The mean age of the study group was 67.4±5.6 years, where 234 were men and 307 were women. The mean value of falls was 2.5±0.7, with minimum value being 2 and maximum value 4 for falls in the recurrent-fall group. The subjects in the recurrent-fall group were significantly older than those in the no-fall and one-fall groups. Regardless of fall group, more women fell than men. Of all the models used, assessment only by TUGT showed a significant difference between the two fall groups. The recurrent-fall group used a walking aid significantly more. Moreover, among the three groups, diabetes or stroke patients were more likely to fall than those who had not been diagnosed with diabetes or stroke, while other variables showed no significant differences among the groups. Only the TUGT results showed a significant difference in the one-fall group and recurrent-fall group.

Table 1 The baseline’s characteristics of study participants (no-fall group, one-fall group, recurrent-fall group) during the follow-up period
Notes: Data are presented as means ± SD for age, body mass index (BMI), grip strength, Timed Up and Go Test (TUGT), 4-meter walking test, and International Physical Activity Questionnaire (IPAQ). All other variables are in percentages; *P<0.05 versus no-fall group; **P<0.05 versus one-fall group; P-value of the ANOVA among the three groups in the table.
Abbreviations: GDS, Geriatric Depression Scale; MET-min/week, metabolic equivalent task minutes per week.

The model for factors related to fall

Table 2 shows the hazards ratio (HR) and 95% confidence interval (95% CI) of the TUGT, 4-meter walking test, and grip strength test for falls during the follow-up period for the any-fall and recurrent-fall groups. In the any-fall group, a significant association between grip strength and falls was observed (HR: 0.968, 95% CI: 0.945–0.991); moreover, the 4-meter walking test and falls were significantly associated. However, the TUGT, the 4-meter walking test, or grip strength test after adjusting age and gender, only the TUGT (HR: 1.070, 95% CI: 1.003–1.142) had a positive association with fall. TUGT showed an association between the recurrent-fall group and falls (HR: 1.160, 95% CI: 1.061–1.268).

Table 2 Hazard ratio (HR) and 95% confidence interval of baseline TUGT, 4-meter walking test, and grip strength for any-fall group and recurrent-fall group during the follow-up period
Note: *P<0.05 versus same group referent values.
Abbreviation: TUGT, Timed Up and Go Test.

The results obtained by TUGT, 4-meter walking test, and grip strength test were analyzed by logistic regression models and the results showed low predictive values for any-fall and recurrent-fall groups (Table 3). The TUGT, the 4-meter walking test, or grip strength test after adjusting age and gender, the predictive value was not high for the any-fall group. Table 2 shows the results obtained by all the three models with and without adjustment for age and gender; no significant associations were found among the groups by all the models tested (P>0.05). Also, no significant predictive value was obtained by the 4-meter walking test (AUC 0.680) and grip strength test (AUC 0.612) for the recurrent-fall group. However, TUGT after adjusted for age and gender showed a slightly better predictive value for recurrent-fall group (AUC 0.733) (Figure 1).

Table 3 Diagnostic value of baseline TUGT, 4-meter walking test, and grip strength measures for any fall and recurrent fall
Notes: aAreas under the curve (AUCs) of the receiver operating characteristic (ROC) curves for grip strength, 4-meter walking test, and TUGT for fallers versus non-fallers and recurrent fallers versus non-fallers; bno adjustment; cadjusted for gender and age.
Abbreviations: CI, confidence interval; TUGT, Timed Up and Go Test.

Figure 1 ROC curve of TUGT as predictor of recurrent falls among elderly individuals (area under ROC curve =0.733 [95% CI: 0.645–0.821]).
Abbreviations: ROC, receiver operating characteristic; TUGT, Timed Up and Go Test; CI, confidence interval.

Further analysis of TUGT

Based on the Youden index, it was found that the most predictive cutoff point of TUGT for elderly individuals who recurrently fell was 10.15 seconds, with 67.5% sensitivity and 56.3% specificity. Using 10.15 seconds as the cutoff time for the TUGT, the PPV and NPV were calculated, which were 10.2% and 95.9%, respectively. With a relative low cutoff point, the sensitivity was moderate and the specificity was low; with an increase in the cutoff point, the sensitivity decreased, whereas the specificity increased. Based on the assessment of the PPV and NPV, the best cutoff point could be 15.96 seconds (13.9% sensitivity and 98.4% specificity; PPV 70.0% and NPV 81.3%).

The TUGT as a continuous predictor had an HR of 1.160 (95% CI 1.061–1.268, P<0.001). Table 2 shows that the value of TUGT increases by one unit (1 second), there was a 16% increased the risk of recurrent falls.


This study showed that the TUGT as a simple, single-item tool has low predictive value for any falls and moderate predictive values for recurrent falls. The TUGT after adjusting the age and gender, was slightly better at predicting future recurrent falls in community-dwelling elderly individuals. Moreover, the cutoff value of 15.96 seconds seems to be a better predictive value to screen for recurrent falls in the current study population of elderly individuals.

We included age and gender as predictors in our model because our group’s previous studies have found that age might be an important factor in affecting balance among women.23 Also a systematic review has found that standardization of testing conditions along with control of significant potential confounders (age and gender) would provide better information about the predictive value of TUGT to measure future falls in older adults.8 Among the three groups, recurrent fallers were most likely to be female and the oldest of the participants (Table 1). Our study found that advanced age and female gender were risk factors for falls, which is in accordance with most of the studies carried out in Western and other Chinese countries.24,25 Therefore, we selected risks factors for falls that previous research had identified: age and gender.

Our study used the standard AUC >0.70, which is used in clinical practice.26,27 Therefore, TUGT can be an effective, simple, and practical tool to predict future recurrent falls in elderly people. This study also did confirm the earlier findings that TUGT is better in predicting recurrent falls, and adding age and gender to the model increases the predictive ability of TUGT.10 However, there is controversy over the predictive value of TUGT. A previous research found that the predictive values obtained using a more reliable follow-up assessment of falls was not the same as those values obtained using TUGT.28 This discrepancy is possibly related to the characteristics of the different study populations. Our study population comprised younger individuals (67.2±5.6), whereas the aforementioned study comprised elderly individuals (84.4±5.3). So, TUGT may be more suitable for our population.

We used two cutoff points: one based on the Youden index (10.15) and the other based on the assessment of PPV and NPV (15.96). However, a recent systematic review and meta-analysis indicated that the TUGT is more useful at ruling out the possibility of falls rather than positively identifying individuals classified as high risk.9 Previous studies26,29 also suggested that the appropriate cutoff must be chosen according to the relative costs (not necessarily financial) of the screening test, which is related to the number of false positives and false negatives and to the prevention strategy that follows after a positive test. If a risk tool is used to select elderly individuals to participate in preventive programs, a cutoff ensuring a relatively high sensitivity is needed so that most of the participants who could become future fallers are identified. In contrast, when the risk tool is used to select subjects for further diagnostic testing in specialized medical settings, a high specificity is needed to ensure that non-fallers will not receive a tiring and costly examination conducted by other medical specialists. We hope the TUGT will be used in primary health care and in hospitals as a screening test for the risk of falls and will allow clinicians to make a definite decision about when an intervention is necessary. Thus, the cutoff value of 15.96 seconds suggested based on the assessment of PPV and the NPV would be the most appropriate.

The findings (Table 2) showed that a higher 4-meter walking test at baseline resulted in a lower risk of falling. These results are in accordance with those of the previous studies.30,31 The present study also found that grip strength may be associated with falls, and previous studies showed that reduced muscle strength plays an important role in falls in older adults.32,33 However, in the full model, the 4-meter walking test and grip strength test are weakly correlated to falls. The fact that 4-meter walking test or grip strength and falls are independent of each other in our study may be explained by previous studies,34,35 which found a nonlinear relationship between 4-meter walking test or grip strength and falls. Given all these, in our population, one must consider other risk factors into account when using 4-meter walking test or grip strength test to study falls.


There were some limitations. First, we could not assess the complete population of elderly individuals; our participants were relatively healthy, community-dwelling older adults who volunteered to participate in health checkups. Thus, the population studied may not be comprehensive enough, so our findings may be weakened by selection bias. Second, our study’s follow-up was short; as a result, the change in elderly health status over the short observation time is small. Third, although the cutoff value of 15.96 seconds obtained based on the assessment of PPV and NPV would be the most appropriate, the cutoff point of TUGT cannot be the same for older adults of 60 years and 80 years. Therefore, in future research, age should be stratified to obtain an optimum cutoff point for each age group. Fourth, there are other parameters of interest in the TUGT (eg, number of steps) that we did not measure in this study. Although the number of steps does not affect the measurement of TUGT, in future research, we will take into account all the parameters of TUGT. Finally, we used only TUGT to predict falls. We are designing a longitudinal study to be carried out in future, with an aim to develop a comprehensive clinical intervention tool (including TUGT combined with other risk factors) that yields relatively higher predictive values when assessing for risk of falls in elderly Chinese individuals.


In summary, TUGT could predict falls. The cutoff value of 15.96 seconds seems to be a better predictive value to screen recurrent falls in community-dwelling elderly Chinese individuals.


The authors thank Peipei Han from the Department of Rehabilitation Medicine, Tianjin Medical University, for processing data and writing documents. This work was supported by the National Natural Science Foundation of China (81372118) and Tianjin Municipal Science and Technology Commission (grant number 16ZXMJSY00070).


The authors report no conflicts of interest in this work.



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