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Table 2 Risk factors for CT in urine specimens from participants 18–49 years of age in Shandong, China

From: Prevalence, risk factors, and medical costs of Chlamydia trachomatis infections in Shandong Province, China: a population-based, cross-sectional study

 

Male

Female

Denominatorc unweighted, weighted

% (95% CI)

Crude OR

Adjusted ORa

95% CI

% (95% CI)

Crude OR

Adjusted ORb

95% CI

Male

Female

All ages

2.7% (1.6–3.8)

   

2.3% (1.5–3.2)

   

3495, 3622

3708, 3581

Age(years)

 

P = 0.02

P = 0.48

  

P = 0.08

P = 0.57

   

 18–24

4.3% (0.0–8.8)

1.00

1.00

1.00–1.00

3.2% (0.4–6.1)

1.00

1.00

1.00–1.00

253, 851

194, 825

 25–29

2.3% (0.5–4.1)

0.52

0.91

0.24–3.48

2.9% (1.9–3.8)

0.88

2.23

0.72–6.86

780, 496

914, 499

 30–34

2.8% (1.3–4.2)

0.63

1.40

0.37–5.35

3.5% (2.6–4.4)

1.08

3.74

1.09–12.83

500, 469

555, 461

 35–39

2.7% (1.1–4.2)

0.61

1.40

0.37–5.21

1.4% (0.4–2.4)

0.42

1.54

0.58–4.06

557, 567

588, 559

 40–44

2.4% (1.3–3.5)

0.54

1.32

0.54–3.24

1.5% (0.4–2.6)

0.46

1.48

0.45–4.86

713, 667

735, 659

 45–49

0.8% (0.2–1.3)

0.17

0.40

0.15–1.03

1.6% (0.9–2.4)

0.50

1.81

0.60–5.45

692, 572

722, 578

Education

 

P = 0.70

   

P = 0.02

P = 0.07

   

 Elementary school, or below

3.2% (0.0–8.3)

1.00

1.6% (1.1–2.2)

1.00

1.00

1.00–1.00

367, 330

806, 697

 Middle school

2.5% (1.4–3.5)

0.75

1.8% (1.2–2.3)

1.08

1.04

0.69–1.55

1906, 1830

1935, 1788

 Senior high school or technical school

3.3% (1.6–5.0)

1.02

3.1% (0.8–5.3)

1.90

1.52

0.80–2.92

920, 1040

669, 752

 College, university, or above

1.4% (0.0–3.1)

0.44

5.2% (0.0–10.6)

3.32

2.11

0.93–4.81

302, 422

298, 344

Marital status

 

P = 0.01

P = 0.45

  

P < 0.01

P < 0.01

   

 Married

2.1% (1.5–2.8)

1.00

1.00

1.00–1.00

1.8% (1.2–2.4)

1.00

1.00

1.00–1.00

3164, 3043

3528, 3253

 Unmarried, divorced or widowed

5.4% (0.9–9.9)

2.61

1.45

0.55–3.84

7.8% (1.4–14.3)

4.65

3.64

1.63–8.13

331, 579

180, 328

Location of residence

 

P = 0.80

   

P = 0.22

    

 urban

2.8% (1.1–4.5)

1.00

2.8% (1.0–4.5)

1.00

1708, 2063

1824, 2040

 rural

2.5% (1.2–3.9)

0.91

1.8% (1.3–2.2)

0.64

1787, 1559

1884, 3581

Living status

 

P = 0.01

P = 0.17

  

P = 0.75

    

 living with family

2.3% (1.5–3.1)

1.00

1.00

1.00–1.00

2.3% (1.4–3.2)

1.00

3279, 3327

3538, 3320

 living with roommates

6.5% (0.0–17.8)

2.99

2.20

0.53–9.19

2.9% (0.0–9.3)

1.29

69, 99

54, 108

 living alone

7.3% (0.0–16.4)

3.38

1.77

0.50–6.22

2.8% (0.0–6.0)

1.21

147, 196

116, 153

Living with spoused

 

P = 0.01

   

P = 0.92

    

 Yes

1.9% (1.5–2.3)

1.00

1.8% (1.1–2.5)

1.00

3080, 3149

3309, 3213

 No

10.4% (0.0–24.6)

5.93

1.9% (0.3–3.5)

1.06

84, 86

219, 244

Smoking

 

P = 0.18

P = 0.42

  

P = 0.31

    

 No

2.1% (0.9–3.3)

1.00

1.00

1.00–1.00

2.3% (1.5–3.1)

1.00

1747, 1785

3309, 3527

 Yes

3.2% (1.5–4.9)

1.58

1.36

0.65–2.86

5.9% (0.0–16.5)

2.68

1748, 1837

70, 54

STI in the past 5 yearse

 

P = 0.01

P = 0.08

  

P = 0.19

P = 0.13

   

 No

2.5% (1.4–3.6)

1.00

1.00

1.00–1.00

2.3% (1.5–3.1)

1.00

1.00

1.00–1.00

3467, 3595

3697, 3572

 Yes

21.1% (0.0–54.8)

10.3

7.65

0.79–73.84

9.0% (0.0–28.4)

4.15

6.21

0.58–66.18

19, 27

11, 9

Age at first intercourse (years)

 

P = 0.01

P = 0.03

  

P < 0.01

P = 0.24

   

 >20

1.8% (1.4–2.3)

1.00

1.00

1.00–1.00

1.9% (1.2–2.6)

1.00

1.00

1.00–1.00

2698, 2549

3308, 3000

  ≤ 20

4.6% (1.0–8.2)

2.58

1.76

1.05–2.94

4.7% (2.5–7.0)

2.59

1.94

0.64–5.90

797, 1073

400, 581

Number of sex partners

 

P < 0.01

P = 0.02

  

P < 0.01

P = 0.04

   

  1

2.1% (1.5–2.8)

1.00

1.00

1.00–1.00

2.0% (1.2–2.7)

1.00

1.00

1.00–1.00

3086, 3107

3597, 3441

  ≥ 2

6.0% (1.5–10.4)

2.92

2.09

1.10–3.94

11.5% (0.0–23.3)

6.47

3.66

1.07–12.48

409, 515

111, 140

Number of new sex partners in the past year

 

P = 0.14

P = 0.40

  

P = 0.44

    

  ≤ 1

2.5% (1.4–3.7)

1.00

1.00

1.00–1.00

2.3% (1.5–3.1)

1.00

3375, 3459

3678, 3549

  ≥ 2

5.2% (0.5–9.8)

2.08

0.56

0.15–2.16

5.0% (0.0–12.0)

2.21

120, 163

30, 32

  1. Abbreviations: CT Chlamydia trachomatis, CI confidence interval, OR odds ratio, AOR adjusted odds ratio, STI sexually transmitted infection
  2. aAdjusted for age, marital status, living status, smoking, STI in the past 5 years, age at first intercourse, number of sex partners, number of new sex partners in the past year and smoking
  3. bAdjusted for age, education, marital status, STI in the past 5 years, age at first intercourse and number of sex partners
  4. cDenominator was participants with sex experience and a urine test result
  5. dThis variable included those who have been married
  6. eSTIs included syphilis, gonorrhea, chlamydia trachomatis infection, condyloma acuminatum, genital herpes, and HIV infection