Table 4. Adjusted* reproductive and occupational associations with gynecologic pain among female factory workers in Tianjin, China (N = 651) .

	Often or usually dysmenorrhea				Non-cyclic pelvic pain				Dyspareunia (N = 381)
	No.	%	OR	CI	No.	%	OR	CI	No.	%	OR	CI
Irregular periods
Yes	39	31.9	1.98	(1.27, 3.12)	37	37.0	2.76	(1.70, 4.48)	33	33.7	2.43	(1.39, 4.23)
No	83	68.1	–	–	63	63.0	–	–	65	66.3	–	–
Heavy periods
Yes	26	21.1	1.83	(1.09, 3.08)	23	22.8	1.49	(0.87, 2.56)	17	17.2	0.98	(0.52, 1.85)
No	97	78.9	–	–	78	77.2	–	–	82	82.3	–	–
Job type
Production staff	86	74.8	1.35	(0.84, 2.16)	69	69.0	1.24	(0.77, 2.00)	55	55.6	0.67	(0.41, 1.10)
Office staff	29	25.2	–	–	31	31.0	–	–	44	44.4	–	–
Worked the night shift in the last 12 months
Yes	63	52.5	1.36	(0.90, 2.05)	55	55.0	1.59	(1.02, 2.48)	50	49.5	1.32	(0.82, 2.14)
No	57	47.5	–	–	45	45.0	–	–	51	50.5	–	–
Worked overtime in the last 12 months
Yes	41	33.9	1.11	(0.72, 1.71)	29	29.0	0.99	(0.61, 1.60)	39	39.0	2.20	(1.30, 3.72)
No	80	66.1	–	–	71	71.0	–	–	61	61.0	–	–
Compulsory overtime
Yes	51	43.2	1.15	(0.75, 1.74)	47	49.0	1.98	(1.25, 3.13)	44	44.9	1.45	(0.89, 2.35)
No	67	56.8	–	–	49	51.0	–	–	54	55.1	–	–
High noise level
Yes	70	59.3	1.38	(0.91, 2.11)	45	45.9	1.01	(0.65, 1.58)	43	45.3	1.30	(0.79, 2.13)
No	48	40.7	–	–	53	54.1	–	–	52	55.8	–	–
Poor job security
Yes	60	51.3	1.91	(1.26, 2.91)	46	46.9	1.64	(1.04, 2.57)	38	40.0	1.21	(0.73, 2.00)
No	57	48.7	–	–	52	53.1	–	–	57	60.0	–	–
High job strain
Yes	44	36.7	2.07	(1.34, 3.22)	29	28.7	1.24	(0.76, 2.02)	27	27.6	1.28	(0.74, 2.22)
No	76	63.3	–	–	72	71.3	–	–	71	72.4	–	–
Health rating
Fair or poor	41	33.6	1.95	(1.24, 3.05)	41	40.6	2.25	(1.41, 3.58)	42	39.6	1.98	(1.19, 3.28)
Excellent, very good, good	81	66.4	–	–	60	59.4	–	–	64	60.4	–	–
Number of sick days taken			1.08	(0.93, 1.26)			1.29	(1.09, 1.51)			1.10	(0.92, 1.31)
Exhausted			1.11	(1.03, 1.20)			1.13	(1.05, 1.23)			1.14	(1.04, 1.26)

*Associations are adjusted for ever having a child.