Prevalence and associated factors of infertility among 20–49 year old women in Henan Province, China

Liang, Shoujing; Chen, Yuanhui; Wang, Qian; Chen, Huanhuan; Cui, Chenchen; Xu, Xiaohang; Zhang, Qingwen; Zhang, Cuilian

doi:10.1186/s12978-021-01298-2

Table 1 Comparison of characteristics of the difference between fertile and infertile group

From: Prevalence and associated factors of infertility among 20–49 year old women in Henan Province, China

Characteristic	Fertile		Infertile		p-value
	(n = 577)		(n = 188)
	n	%	n	%
Region
Zhengzhou	124	21.5	62	33.0	0.012
Luoyang	144	25.0	44	23.4
Xinxiang	161	27.9	46	24.5
Zhumadian	148	25.6	36	19.1
Household registry
Non-agricultural	272	47.1	92	48.9	0.669
Agricultural	305	52.9	96	51.1	0.669
Nationality
Han nationality	570	98.8	187	99.5	0.425
Minority	7	1.2	1	0.5	0.425
Occupation
Unemployed	74	12.8	30	16.0	0.541
Head of enterprises and state institutions	79	13.7	29	15.4
Professional worker	226	39.2	60	31.9
Clerk	24	4.2	5	2.7
Service worker	79	13.7	26	13.8
Agricultural and related worker	13	2.3	7	3.7
Operator	4	0.7	1	0.5
Other	78	13.5	30	16.0
Education
Middle school and below	75	13	33	17.6	0.391
High school or technical secondary school	91	15.8	25	13.3
Junior college degree	130	22.5	38	20.2
Bachelor’s degree and above	281	48.7	92	48.9
Annual household income (yuan)
≤ 10,000	139	24.1	42	22.3	0.450
1–20,000	121	21	41	21.8
2–30,000	101	17.5	32	17.0
3–50,000	127	22	34	18.1
≥ 50,000	89	15.4	39	20.7
Age (years)
20–24	33	5.7	2	1.1	< 0.001
25–29	158	27.4	22	11.7
30–34	187	32.4	75	39.9
35–39	95	16.5	54	28.7
40–44	71	12.3	24	12.8
45–49	33	5.7	11	5.9
BMI (kg/m²)
Thin	39	6.8	16	8.5	0.486
Normal	373	64.6	110	58.5
Overweight	125	21.7	48	25.5
Obese	40	6.9	14	7.4
WHR
≤ 0.85	348	60.3	126	67.0	0.100
> 0.85	229	39.7	62	33.0	0.100
Irregular menstruation
No	403	69.8	122	64.9	0.204
Yes	174	30.2	66	35.1	0.204
Dysmenorrhea
No	330	57.2	103	54.8	0.563
Yes	247	42.8	85	45.2	0.563
Age of marriage (years)
≤ 24	303	52.5	78	41.5	0.041
25–29	255	44.2	98	52.1
≥ 30	19	3.3	12	6.4
Age of first sexual intercourse (years)
< 20	78	13.5	18	9.6	0.197
20–25	382	66.2	123	65.4
> 25	117	20.3	47	25.0
PCOS
No	511	88.6	167	88.8	0.920
Yes	66	11.4	21	11.2	0.920
History of gynecological surgery
No	538	93.2	149	79.3	< 0.001
Yes	39	6.8	39	20.7	< 0.001
Smoking
No	430	74.5	147	78.2	0.592
No, secondhand smoke	139	24.1	39	20.7
Yes	8	1.4	2	1.1
Drinking
No	503	87.2	173	92.0	0.072
Yes	74	12.8	15	8.0	0.072
Sweet food
Often	124	21.5	34	18.1	0.006
Sometimes	321	55.6	89	47.3
Seldom	132	22.9	65	34.6
Fried food
Often	91	15.8	20	10.6	0.196
Sometimes	368	63.8	124	66.0
Seldom	118	20.5	44	23.4
Work pressure
A little	107	18.5	41	21.8	0.482
Some	215	37.3	68	36.2
Medium	237	41.1	70	37.2
A lot	18	3.1	9	4.8
Long-term air-conditioning environment
No	203	35.2	86	45.7	0.009
Yes	374	64.8	102	54.3	0.009
Renovation within six months
No	469	81.3	153	81.4	0.976
Yes	108	18.7	35	18.6	0.976
DOR
No	561	97.2	164	87.2	< 0.001
Yes	16	2.8	24	12.8	< 0.001
History of colpitis
No	404	70.0	139	73.9	0.304
Yes	173	30.0	49	26.1	0.304
History of cervicitis
No	488	84.6	159	84.6	1.000
Yes	89	15.4	29	15.4	1.000
History of pelvic inflammation
No	470	81.5	154	81.9	0.888
Yes	107	18.5	34	18.1	0.888
History of uterine fibroids
No	564	97.7	179	95.2	0.071
Yes	13	2.3	9	4.8	0.071
History of endometriosis
No	565	97.9	179	95.2	0.048
Yes	12	2.1	9	4.8	0.048
History of artificial abortion
No	351	60.8	122	64.9	0.319
Yes	226	39.2	66	35.1	0.319
History of medical abortion
No	469	81.3	161	85.6	0.174
Yes	108	18.7	27	14.4	0.174
History of spontaneous abortion
No	526	91.2	164	87.2	0.116
Yes	51	8.8	24	12.8	0.116
History of ectopic gestation
No	557	96.5	176	93.6	0.083
Yes	20	3.5	12	6.4	0.083

p-value was based on Person’s Chi-squared test

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