Effect of intervention (after vs before) on probability of quitting by delivery
Variable | OR | 95% CI | Pr(>|z|) |
Intercept: baseline | 0.13 | 0.09 to 0.19 | <0.001 |
After implementation of intervention, compared with before | |||
After intervention | 1.81 | 1.55 to 2.12 | <0.001 |
Ethnic group, compared with white | |||
Caucasian | 2.52 | 1.837 to 3.44 | <0.001 |
SEP category (based on IMD score) compared with middle three-fifths of distribution | |||
Least deprived fifth | 2.75 | 2.386 to 3.18 | <0.001 |
Most deprived fifth | 0.4 | 0.42 to 0.65 | <0.001 |
Maternal age category, compared with 21–30 years | |||
15–20 years | 0.75 | 0.655 to 0.87 | <0.001 |
31–40 years | 1.43 | 1.29 to 1.60 | <0.001 |
41–55 years | 1.14 | 0.76 to 1.71 | 0.526 |
Engagement with smoking cessation services, compared with not referred | |||
Referred, quit date | 4.18 | 3.53 to 4.94 | <0.001 |
Referred, no quit date | 3.33 | 2.99 to 3.71 | <0.001 |
Time since start of intervention, compared with before | |||
Each additional month | 1.02 | 1.00 to 1.03 | <0.050 |
9967 valid cases included in model (6.6% cases with missing data excluded).
SEP, socioeconomic position (categories defined by fifths of Index of Multiple Deprivation (IMD) score)