Single item presenteeism question (SIPQ) is a rating scale to assess the impact of low back pain (LBP) on presenteeism.
OBJECTIVE:
To translate the SIPQ into Persian language (SIPQ-P) and evaluate the reliability and validity of the SIPQ-P in participants with LBP.
METHODS:
In the first stage, the English SIPQ was translated into Persian language in a cross-sectional design following standard forward-backward approach with expert panel review and pilot testing. In the second stage with a prospective cohort design, 100 participants with LBP (84 male and 16 female, mean age±SD: 33.9±11.2 years) participated. Participants were asked to answer the SIPQ-P and rate their LBP from 0 to 10 according to the numerical pain rating scale (NPRS) for concurrent criterion validity. To evaluate the convergent construct validity of SIPQ, participants completed Persian Functional Rating Index (PFRI). For the divergent validity, the Spearman’s correlation test was used to evaluate the association between the SIPQ-P and education. For the test-retest reliability, 50 participants answered the SIPQ-P after 7 days. Fifty healthy participants (mean age±SD: 24.24±8.07 years) answered the SIPQ-P for evaluating discriminant validity.
RESULTS:
There was a significant difference between the SIPQ-P score of participants and the healthy participants (p < 0.001). The concurrent criterion validity was demonstrated by a significant correlation between the SIPQ-P and pain NPRS (Spearman’s rho = 0.46, p < 0.001). The Spearman correlation coefficient showed a significant correlation between the SIPQ-P scores and the Persian FRI (r = 0.56, p < 0.001). There was no correlation between the SIPQ-P score and the education level (r = –0.001, p = 0.99). The ICCagreement was 0.77 indicating a very good test-retest reliability.
CONCLUSIONS:
This study showed that the Persian version of SIPQ is a reliable and valid scale to assess the effect of LBP on presenteeism in Persian speakers with LBP.
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