Table 3.

Results of univariate logistic regression analysis of risk factors for HPV infection in FSWs

Category	HPV (+)	HPV (-)	Odds ratio (95 % CI)	P
Marital status
Single	29	28	1
Married	55	63	0.84 (0.45–1.59)	0.39
Widowed	7	4	1.69 (0.45–6.41)	0.49
Divorced	54	69	0.76 (0.40–1.42)	0.10
Education
≤Middle school	110	132	1
≥High school	35	32	1.31 (0.76–2.26)	0.10
Active smoking
No	100	110	1
Yes	45	54	0.92 (0.57–1.48)	0.76
Second hand smoking
No	76	76	1
Yes	69	88	0.78 (0.50–1.23)	0.25
Number of abortion
≤3	130	136	1
>3	15	28	0.56 (0.29–1.10)	0.11
Sexual disease history
No	137	148	1
Yes	8	16	0.54 (0.22–1.30)	0.19
Condom use
No	29	34	1
Yes	116	130	1.05 (0.60–1.82)	0.73
Contraception pills
No	109	121	1
Yes	36	43	0.93 (0.56–1.55)	0.84
Age of first period (years)
≤13	28	32	1	0.97
14–15	58	69	0.96 (0.52–1.78)	0.96
16–17	43	43	1.14 (0.59–2.21)	0.77
≥18	16	20	0.91 (0.40–2.10)	0.73
Age of 1st sexual intercourse
≤20 years	85	72	1	0.00
21–23 years	47	80	0.40 (0.24–0.67)	0.12
≥24 years	13	12	0.99 (0.53–1.85)	0.81
Time as a sex worker
<1 year	114	127	1
≥1 year	31	37	0.93 (0.54–1.60)	0.93
Use of vaginal medications
No	92	102	1
Yes	53	62	0.95 (0.60–1.50)	0.82
Regular Ob/Gyn exams
No	95	115	1
Yes	50	49	1.24 (0.77–1.99)	0.46
Menopause
No	131	156	1
Yes	14	8	0.85–5.12	0.11