Table 2.
Prevalence of maternal smoking during pregnancy according to maternal and prenatal characteristics and public maternity
| Maternal and prenatal characteristics | Maternity/City | |||
|---|---|---|---|---|
| A - Niterói | B - Rio de Janeiro | |||
| Prev. a (%) | p-value | Prev. a (%) | p-value | |
| Age group (years)b | 0.21 | 0.01 | ||
| 10 - 19 | 19.1 | - | 10.3 | - |
| 20 - 34 | 28.3 | - | 21.2 | - |
| ≥35 | 21.1 | - | 14.9 | - |
| Partnerc | 0.32 | 0.22 | ||
| absence | 28.2 | - | 20.2 | - |
| presence | 23.8 | - | 17.2 | - |
| Skin colorc | 0.40 | <0.01 | ||
| white | 20.7 | - | 15.5 | - |
| brown | 27.4 | - | 15.1 | - |
| black | 24.6 | - | 24.6 | - |
| Maternal Education Level (years of study)b | <0,01 | <0.01 | ||
| ≥4 | 15.4 | - | 20.6 | - |
| 5-7 | 36.8 | - | 24.4 | - |
| 8-11 | 19.1 | - | 15.4 | - |
| ≥12 | 15.4 | - | 14.0 | - |
| Family income per month (USD)b | 0.14 | 0.04 | ||
| <$88.47 | 27.1 | - | 22.8 | - |
| $88.47 to $331.47 | 26.2 | - | 17.4 | - |
| ≥$331.47 | 13 | - | 13.2 | - |
| Parityc | <0.01 | <0.01 | ||
| primiparous | 11.9 | - | 11.1 | - |
| multiparous | 33.6 | - | 22.7 | - |
| Adequacy of prenatal careb | <0.01 | <0.01 | ||
| Inadequate | 31.1 | - | 20.4 | - |
| Intermediate | 21.4 | - | 15.9 | - |
| Adequate | 16.9 | - | 11.9 | - |
| More than adequate | 12.5 | - | 6.7 | - |
| Total | 24.8 | - | 17.9 | - |
aPrevalence; bChi-square Linear Trend; cPearson’s chi-square test.
Note: The sums of the frequencies of the categories for each variable are not equal due to exclusion of records with missing information or information ignored in the analysis.