Table 1.

Item-total Correlations

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

EPBD = Endometriosis Pain and Bleeding Diary