Table 3

Contingency table analysis. Sensitivity is the proportion of patients with insufficient responses at 30 min from those with insufficient responses at 60 min. Specificity is the proportion of patients with normal responses at 30 min from those with normal responses at 60 min. Positive predictive value is the proportion of patients with insufficient responses at 60 min who also have insufficient responses at 30 min. Negative predictive value is the proportion of participants with normal responses at 60 min from those with normal responses at 30 min

 Group A(patients on steroids) Group B(patients not on steroids) Whole sample Sensitivity 1.00 1.00 1.00 Specificity 0.884 0.958 0.943 Positive predictive value 0.864 0.476 0.763 Negative predicative value 1.00 1.00 1.00 McNemar’s test p value 0.013 0.002 0.00003