Table 3.
The interaction effect between age and SES on SHS exposure among pregnant women in the 3rd trimester
| 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] | ||
Values indicated in bold are statistically significant
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
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
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
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