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Construct validity and factor structure of a Spanish-language Social Support Questionnaire during early pregnancy

Authors Friedman LE, Manriquez Prado AK, Santos Malavé GF, Vélez JC, Gillibrand Esquinazi RW, Sanchez SE, Zhong QY, Gelaye B, Williams MA

Received 22 December 2017

Accepted for publication 24 April 2018

Published 19 July 2018 Volume 2018:10 Pages 379—385


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 3

Editor who approved publication: Professor Elie Al-Chaer

Lauren E Friedman,1 Ana Karen Manriquez Prado,2,* Gabriel Fidel Santos Malavé,2,* Juan Carlos Vélez,3 Rodrigo Winston Gillibrand Esquinazi,4 Sixto E Sanchez,5,6 Qiu-Yue Zhong,1 Bizu Gelaye,1 Michelle A Williams1

1Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, MA, USA; 2Multidisciplinary International Research Training Program, Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, MA, USA; 3Department of Rehabilitation, Hospital del Trabajador, Santiago, Chile; 4Department of Mental Health, Hospital del Trabajador, Santiago, Chile; 5Universidad Peruana de Ciencias Aplicadas, Lima, Peru; 6Asociación Civil PROESA, Lima, Peru

*These authors contributed equally to this work

Background: The Social Support Questionnaire – Short Form (SSQ-6) is a widely used instrument that assesses availability and satisfaction of a person’s social support. The present study aimed to evaluate the construct validity and factor structure of the Spanish language version of the SSQ-6 during early pregnancy.
Participants and methods: A total of 4,236 pregnant Peruvian women were interviewed at 10.3 ± 3.8 weeks of gestation. In-person interviewers were used to collect lifestyle, demographic, and social support characteristics. The construct validity and factorial structure of the SSQ-6 were assessed through exploratory factor analysis (EFA) and confirmatory factor analysis (CFA). The internal consistency was evaluated using Cronbach’s alpha.
Results: The mean SSQ-6 score was 39.6 ± 6.8 and Cronbach’s alpha was 0.83. EFA resulted in a three-factor solution that accounted for 60.6% of the variance. CFA results confirmed the three-factor structure and yielded measures indicating goodness of fit (comparative fit index of 0.9401) and accuracy (root mean square error of approximation of 0.0394).
Conclusion: Although the SSQ-6 was originally developed as a two-factor model, and previous studies have supported this, in our study a three-factor model was found to be more appropriate. The SSQ-6 was found to have good construct validity and reliability for assessing social support.

Keywords: social support, SSQ-6, pregnancy, validation

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