Table 2 Risk of bias across the included studies
From: Prevalence of low back pain in adolescents with idiopathic scoliosis: a systematic review
Theroux et al. 2016 [16] | Makino et al. 2015 [17] | |
|---|---|---|
Study’s target population close representation of the national population for relevant variables. | High Risk | High Risk |
Sampling frame a true or close representation of the target population | High Risk | High Risk |
Random selection used to select the sample or census undertaken | High Risk | High Risk |
Likelihood of non-response bias minimal | Low Risk | Low Risk |
Data collected directly from the subjects | High Risk | High Risk |
Acceptable case definition used in the study | High Risk | High Risk |
Study instrument that measured the parameter of interest shown to have reliability and validity | Low Risk | Low Risk |
Same mode of data collection used for all subjects | Low Risk | Low Risk |
Length of the shortest prevalence period for the parameter of interest appropriate | Low Risk | Low Risk |
Numerator and denominator for the parameter of interest appropriate | Low Risk | Low Risk |