Table 2:

Menstrual and reproductive history of women with dysmenorrhea and controls

	HC (n=44)	DYS (n=166)	DYSB (n=46)	BPS (n=27)	P-value	DYS vs. HC	DYSB vs. HC	DYS vs. DYSB
Menstrual pain without analgesics (VAS)	15 (2)	72 (1)	73 (2)	72 (5)	<.001	<.001	<.001	0.985
Menstrual pain with analgesics (VAS)	10 (3)	41 (2)	50 (4)	56 (6)	<.001	<.001	<.001	0.092
Average length of menstrual cycle
21 days or less	2 (4.5%)	11 (6.6%)	5 (11.1%)	4 (17.4%)	0.599	0.475	0.626	0.530
22–34 days	36 (81.8%)	142 (85.5%)	36 (80.0%)	17 (73.9%)
35 days or longer	4 (9.1%)	6 (3.6%)	3 (6.7%)	1 (4.3%)
Not sure	2 (4.5%)	7 (4.2%)	1 (2.2%)	1 (4.3%)
Number of days menstrual bleeding	5.9 (0.5)	5.8 (0.1)	5.7 (0.2)	6.4 (0.5)	0.428	0.944	0.955	1.000
Prior birth control pill usage
Yes	15 (34.1%)	67 (40.4%)	15 (32.6%)	19 (70.4%)	0.008	0.448	0.882	0.339
I never have had sex with a male partner
Yes	11 (25.0%)	36 (21.7%)	7 (15.2%)	0 (0.0%)	0.036	0.639	0.246	0.334
Children delivered
None	43 (97.7%)	156 (94.0%)	43 (93.5%)	24 (88.9%)	0.502	0.321	0.328	0.901
Vaginal births
None	43 (97.7%)	159 (95.8%)	44 (95.7%)	24 (88.9%)	0.359	0.549	0.584	0.969
Previously diagnosed with PID?
Yes	40 (97.6%)	107 (91.5%)	29 (100.0%)	17 (85.0%)	0.109	0.186	0.397	0.103

The mean (SEM - standard error of the mean) or sample size (percentage) for each item for each of the 4 groups is shown. Note bivariate contrasts for BPS are fully shown in Supplemental Table 1. The right 4 columns indicate the significance for contrasts for aggregate group differences, DYS vs. HC, DYSB vs. HC, DYS vs. DYSB. DYS – dysmenorrhea, DYSB-dysmenorrhea with bladder sensitivity, HC healthy controls, BPS bladder pain syndrome, VAS – visual analogue scale (0–100), PID – pelvic inflammatory disease