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Validation of a self-administered questionnaire for assessing exposure to back pain mechanical risk factors

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Academic year: 2021

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Table 1 Answer frequencies of data from concurrent validity tests (self-report, corresponding variables from direct observations and observer opinion)
Table 2 Agreement tests for dichotomous variables (n subjects, kappa at P<0.05 level and full agreement percentage) between worker self-report data and corresponding variables from direct observations and between worker and observer estimates
Table 4 Univariate Relative Risks (RR) and 95% confidence interval (95% CI) for a low back pain (LBP) episode lasting 7 days or more during a 1-year follow-up when exposure is assessed by means of a questionnaire (RR quest) or from direct observations (RR o

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