. Author manuscript; available in PMC: 2015 May 1.

Published in final edited form as: Am J Obstet Gynecol. 2014 Jan 31;210(5):477.e1–477.e12. doi: 10.1016/j.ajog.2014.01.035

Table 2.

Participant characteristics

		Control	POP Case	P-Value	Univariate Odds Ratio (95% CI)
Age, (continuous)	N	191	191	NA	NA
Age, (continuous)	Mean (SD)	50.74 (7.09)	51.31 (7.07)

Age (categorical)				NA	NA
39 to 50-	N	81	81
39 to 50-	%^*	42.41	42.41
50 to 61-	N	88	88
50 to 61-	%	46.07	46.07
61 to 65	N	22	22
61 to 65	%	11.52	11.52

BMI (continuous, units = 5 for OR estimate)	N	191	191	0.051	1.243 (0.999, 1.545)
BMI (continuous, units = 5 for OR estimate)	Mean	25.23 (4.60)	26.17 (4.74)

BMI (categorical)				0.1288
18.5 to 25-	N	112	95		Referent
18.5 to 25-	%	58.64	49.74
25 to 30-	N	49	52		1.251 (0.777, 2.015)
25 to 30-	%	25.65	27.23
30 to 40-	N	30	44		1.729 (1.009, 2.963)
30 to 40-	%	15.71	23.04

Parity (continuous)	N	190	189	<0.0001	1.495 (1.299, 1.722)
	Mean (SD)	1.84 (1.57)	2.83 (1.59)
	Median (range)	2.00 (0.00,7.00)	3.00 (0.00, 8.00)

Parity (categorical)				<0.0001
Missing	N	1	2
Missing	%	0.52	1.05
0	N	54	15		Referent
0	%	28.27	7.85
1	N	23	13		2.035 (0.837, 4.948)
1	%	12.04	6.81
2	N	57	58		3.663 (1.858, 7.222)
2	%	29.84	30.37
3+	N	56	103		6.621 (3.429, 12.787)
3+	%	29.32	53.93

Number of vaginal deliveries	N	190	189	<0.0001	1.547 (1.346, 1.779)
	Mean (SD)	1.53 (1.58)	2.66 (1.64)
	Median (range)	1 (0–7)	2 (0–8)

Vaginal Delivery (categorical)				<0.0001
Missing	N	1	2
Missing	%	0.52	1.05
0	N	76	19		Referent
0	%	39.79	9.95
1	N	24	21		3.500 (1.618, 7.573)
1	%	12.57	10.99
2	N	39	55		5.641 (2.948, 10.793)
2	%	20.42	28.80
3+	N	51	94		7.372 (4.016, 13.533)
3+	%	26.70	49.21

Number of Cesarean deliveries	N	189	189	0.0459	0.703 (0.497, 0.994)
	Mean (SD)	0.31 (0.77)	0.17 (0.49)
	Median (range)	0(0,6)	0(0, 3)

Cesarean Delivery (categorical)				0.0628
Missing	N	2	2
Missing	%	1.05	1.05
0	N	154	163		Referent
0	%	80.63	85.34
1	N	17	21		1.167 (0.593, 2.295)
1	%	8.90	10.99
2	N	15	3		0.189 (0.054, 0.666)
2	%	7.85	1.57
3+	N	3	2		0.630 (0.104, 3.821)
3+	%	1.57	1.05

Hispanic				0.5873
No	N	183	185		Referent
No	%	95.81	96.86
Yes	N	8	6		0.742 (0.252, 2.180)
Yes	%	4.19	3.14

Race (OR and p-value are based on non-white versus white)				0.9909	0.995 (0.386, 2.563)
Missing	N	1	0
Missing	%	0.52	0.00
American Indian	N	0	2
American Indian	%	0.00	1.05
Asian	N	8	6
Asian	%	4.19	3.14
Black	N	1	1
Black	%	0.52	0.52
White	N	181	182
White	%	94.76	95.29

Highest grade or year of school completed				0.0805
Less Than High School	N	0	1		NA
Less Than High School	%	0.00	0.52
High School	N	16	20		1.983 (0.935, 4.205)
High School	%	8.38	10.47
Some College/Associates	N	48	54		1.700 (0.989, 2.921)
Some College/Associates	%	25.13	28.27
Bachelors	N	59	71		1.818 (1.091, 3.031)
Bachelors	%	30.89	37.17
Graduate/Professional Degree	N	68	45		Referent
Graduate/Professional Degree	%	35.60	23.56

Current smoker				0.7784
No	N	184	185		Referent
No	%	96.34	96.86
Yes	N	7	6		0.853 (0.281, 2.586)
Yes	%	3.66	3.14

Hysterectomy				0.8841
No	N	163	164		Referent
No	%	85.34	85.86
Yes	N	28	27		0.958 (0.541, 1.697)
Yes	%	14.66	14.14

Post-menopausal				0.2189
Missing	N	2	0
Missing	%	1.05	0.00
No	N	103	87		Referent
No	%	53.93	45.55
Yes	N	80	97		1.435 (0.952, 2.166)
Yes	%	41.88	50.79
Don’t Know	N	6	7		1.381 (0.447, 4.264)
Don’t Know	%	3.14	3.66

Hypertension				0.7655
No	N	164	166
No	%	85.86	86.91
Yes	N	27	25		0.915 (0.510, 1.642)
Yes	%	14.14	13.09

Arthritis				0.7815
No	N	161	159		Referent
No	%	84.29	83.25
Yes	N	30	32		1.080 (0.627, 1.861)
Yes	%	15.71	16.75

Diabetes				0.4198
No	N	187	189		Referent
No	%	97.91	98.95
Yes	N	4	2		0.495 (0.090, 2.734)
Yes	%	2.09	1.05

Cancer				0.1097
No	N	182	174		Referent
No	%	95.29	91.10
Yes	N	9	17		1.976 (0.858, 4.550)
Yes	%	4.71	8.90

Cough				0.1383
No	N	186	190		Referent
No	%	97.38	99.48
Yes	N	5	1		0.196 (0.023, 1.692)
Yes	%	2.62	0.52

Heart attack or angina				NA	NA
No	N	190	191
No	%	99.48	100.00
Yes	N	1	0
Yes	%	0.52	0

Major depression				0.4819
No	N	183	180		Referent
No	%	95.81	94.24
Yes	N	8	11		1.398 (0.550, 3.556)
Yes	%	4.19	5.76

Allergies				0.2729
No	N	125	135		Referent
No	%	65.45	70.68
Yes	N	66	56		0.786 (0.510, 1.209)
Yes	%	34.55	29.32

Sleep apnea				0.0418
No	N	188	180
No	%	98.43	92.24
Yes	N	3	11		3.830 (1.051, 13.952)
Yes	%	1.57	5.76

Chronic Constipation				0.6624
No	N	162	165
No	%	84.82	86.39
Yes	N	29	26		0.880 (0.497, 1.560)
Yes	%	15.18	13.61

Number of prescription medications, other than vitamins and hormones (continuous)	N	189	190	0.7601	1.016 (0.915, 1.129)
	Mean (SD)	1.5 (1.74)	1.6 (2.10)
	Median (range)	1 (0,9)	1(0,12)

Self-reported health status				0.5401
Excellent	N	62	56		Referent
Excellent	%	32.46	29.32
Very Good	N	91	97		1.180 (0.744, 1.871)
Very Good	%	47.64	50.79
Good	N	37	34		1.017 (0.564, 1.834)
Good	%	19.37	17.80
Fair	N	1	4		4.428 (0.481, 40.810)
Fair	%	0.52	2.09

Recruitment Type				NA
Primary	N	175	176		NA
Primary	%	92.15	92.15
Community	N	15	15		NA
Community	%	7.85	7.85

Column percentage