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Table 3 The interaction effect between age and SES on SHS exposure among pregnant women in the 3rd trimester

From: Association between secondhand smoke exposure in pregnant women and their socioeconomic status and its interaction with age: a cross-sectional study

Model

Variables

Categories

P for multiplicative interaction

Model 1 a

Marital status

  

Divorced but living together/Cohabiting relationship

0.009

Married and living together

 [reference]

Model 2 b

Employment

  

No

0.950

Yes

 [reference]

Model 3 c

Educational attainment

  

Junior middle school or below

0.010

High school or technical secondary school

0.004

College or above

[reference]

Model 4 d

Personal income per month in RMB

  

≤3000

0.318

3001–7999

0.313

≥8000

[reference]

  1. Values indicated in bold are statistically significant
  2. aModel included marital status and marital status*age and was adjusted for employment, educational attainment, personal income per month, age, ethnicity, household registration status, smoking habit, currently exercising and drinking, employment status of spouses/partners, educational attainment of spouses/partners, drinking habit of spouses/partners in the last year, living with an aunt/uncle after getting married, regular antenatal examinations and complications of pregnancy
  3. bModel included employment and employment*age and was adjusted for marital status, educational attainment, personal income per month, age, ethnicity, household registration status, smoking habit, current exercising and drinking, employment status of spouses/partners, educational attainment of spouses/partners, drinking habit of spouses/partners in the last year, living with an aunt/uncle after getting married, regular antenatal examinations and complications of pregnancy
  4. cModel included educational attainment and educational attainment*age and was adjusted for marital status, employment status, personal income per month, age, ethnicity, household registration status, smoking habit, current exercising and drinking, employment status of spouses/partners, educational attainment of spouses/partners, drinking habit of spouses/partners in the last year, living with an aunt/uncle after getting married, regular antenatal examinations and complications of pregnancy
  5. dModel included personal income per month and personal income per month *age and was adjusted for marital status, employment status, educational attainment, age, ethnicity, household registration status, smoking habit, current exercising and drinking, employment status of spouses/partners, educational attainment of spouses/partners, drinking habit of spouses/partners in the last year, living with an aunt/uncle after getting married, regular antenatal examinations and complications of pregnancy