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Table 2 Univariate logistic regression analysis for factors that affect smoking among pregnant women, China, 2015

From: Smoking in pregnancy: a cross-sectional study in China

Variable OR(95%CI) p-value
Hospital level
 Level 2 A hospitals vs. Level 2B hospitals and below 1.04(0.49,2.19) 0.923
 Level 3A hospital vs. Level 2B hospitals and below 0.84(0.33,2.16) 0.716
Parity
 Pregnant women in their second pregnancy vs.  Pregnant women in their first pregnancy 1.02(0.63,1.66) 0.929
Nationality
 Minority vs. Han nationality 0.54(0.13,2.23) 0.395
Single-child
 Yes vs. No 0.82(0.54,1.26) 0.371
Husband was single-child
 Yes vs. No 0.91(0.60,1.39) 0.664
Marital status
 Unmarried vs. Married 2.33(0.82,6.64) 0.112
 Remarried vs. Married 1.59(0.57,4.47) 0.380
 Divorced or Widowed vs. Married 1.31(0.17,9.89) 0.793
Education level
 Secondary education vs. Basic education 2.55(0.88,7.40) 0.086
 Higher education vs. Basic education 3.88(1.56,9.66) 0.004
Residence
 Urban vs. Rural 0.81(0.49,1.33) 0.396
The per capita income of the family
 4500¥ and 9000 ¥ vs. <4500¥ 0.81(0.48,1.37) 0.433
  > 9000¥ vs. <4500¥ 1.05(0.62,1.80) 0.853
Trimester of pregnancy
 Second trimester vs. First trimester 0.89(0.47,1.71) 0.727
 Third trimester vs. First trimester 0.70(0.38,1.30) 0.258
Age
 26–35 years old vs. 18–25 years old 1.40(0.83,2.34) 0.207
 36–45 years old vs. 18–25 years old 1.04(0.35,3.12) 0.939
Occupation
 Manual vs. Non-manual 1.23(0.68,2.23) 0.503
 Unemployed vs. Non-manual 0.85(0.49,1.48) 0.559
 Others vs. Non-manual 1.08(0.57,2.08) 0.810
Smoking status of peers of pregnant women
 Husband (Smoker vs. Non-smoker) 1.10(0.72,1.68) 0.667
 Father-in-law (Smoker vs. Non-smoker) 0.92(0.58,1.46) 0.710
 Mother-in-law (Smoker vs. Non-smoker) 4.40(1.81,10.74) 0.001
 Father (Smoker vs. Non-smoker) 1.01(0.64,1.60) 0.975
 Mother (Smoker vs. Non-smoker) 1.48(0.20,11.24) 0.705
 Colleague (Smoker vs. Non-smoker) 0.78(0.49,1.27) 0.326
 Friend (Smoker vs. Non-smoker) 0.89(0.56,1.42) 0.627
 Relative (Smoker vs. Non-smoker) 0.83(0.51,1.37) 0.468
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