Table 1

 Intracluster correlation coefficients (ICCs) and variance inflation factors (VIFs) for all four outcome measures

OutcomeOriginal p valuesICCVIFAdjusted p values
Score at 60 seconds0.0340.0001.000.048
Total score overall0.0670.0111.150.095
Proportion with maximum score at 60 seconds0.0540.0021.030.077
Proportion with maximum score overall0.1000.0161.220.123