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Table 1 Item-total Correlations

From: The development and validation of the daily electronic Endometriosis Pain and Bleeding Diary

EPBD Item Day 1 Day 7 Day 14 Day 21 Day 25
Worst intermittent pain 0.79 0.65 0.72 0.66 0.70
Episodes of intermittent pain 0.56 0.59 0.58 0.52 0.54
Duration of intermittent pain 0.52 0.46 0.40 0.51 0.55
Average continuous pain 0.89 0.78 0.83 0.84 0.81
Worst continuous pain 0.87 0.80 0.83 0.81 0.81
Duration of continuous pain 0.62 0.64 0.68 0.60 0.66
Pain interference 0.81 0.78 0.82 0.77 0.83
  1. EPBD = Endometriosis Pain and Bleeding Diary