Those variables (previous LBP, trauma during
pregnancy, and LBP during menstruation) that were
able to be answered dichotomously with a yes/no
answer were also analyzed for specificity, sensitivity,
positive and negative predictive values, and positive
and negative likelihood ratios (Sackett et al, 2000;
Portney and Watkins, 2000; Cleland, 2005).
Those variables (previous LBP, trauma during
pregnancy, and LBP during menstruation) that were
able to be answered dichotomously with a yes/no
answer were also analyzed for specificity, sensitivity,
positive and negative predictive values, and positive
and negative likelihood ratios (Sackett et al, 2000;
Portney and Watkins, 2000; Cleland, 2005).
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