Overall N#=8 00 619 | <30 years n=4 09 942 | ≥30 years n=3 90 677 | Primiparous n=3 38 752 | Multiparous n=4 61 552 | Disadvantaged SES n=2 21 097 | Average SES n=2 63 514 | Advantaged SES n=3 06 207 | ||
Time only | Time | 0.9961* (0.9959 to 0.9964) | 0.9966* (0.9963 to 0.9969) | 0.9956* (0.9952 to 0.9960) | 0.9958* (0.9952 to 0.9964) | 0.9964* (0.9961 to 0.9967) | 0.9980* (0.9976 to 0.9984) | 0.9964* (0.9960 to 0.9968) | 0.9957* (0.9952 to 0.9963) |
Partially adjusted | Time | 0.9966* (0.9952 to 0.9980) | 0.9978* (0.9964 to 0.9992) | 0.9955* (0.9934 to 0.9976) | 0.9927* (0.9901 to 0.9954) | 0.9984* (0.9969 to 1.0000) | 0.9975* (0.9957 to 0.9994) | 0.9972* (0.9953 to 0.9992) | 0.9914* (0.9888 to 0.9941) |
50% and 75% ban and graphic warnings† | 0.9995 (0.9970 to 1.0021) | 0.9986 (0.9959 to 1.0012) | 1.0008 (0.9969 to 1.0047) | 1.0054* (1.0005 to 1.0103) | 0.9967* (0.9939 to 0.9996) | 1.0027 (0.9993 to 1.0062) | 0.9985 (0.9950 to 1.0021) | 1.0061* (1.0011 to 1.0113) | |
100% ban† | 1.0000 (0.9972 to 1.0028) | 0.9998 (0.9969 to 1.0026) | 1.0000 (0.9958 to 1.0043) | 1.0013 (0.9960 to 1.0065) | 0.9995 (0.9963 to 1.0026) | 0.9975 (0.9937 to 1.0014) | 1.0004 (0.9966 to 1.0042) | 1.0002 (0.9948 to 1.0057) | |
Tobacco tax† | 0.9982 (0.9937 to 1.0028) | 1.0000 (0.9952 to 1.0047) | 0.9938 (0.9869 to 1.0009) | 0.9761* (0.9678 to 0.9845) | 1.0107* (1.0054 to 1.0159) | 0.9909* (0.9844 to 0.9975) | 1.0032 (0.9970 to 1.0094) | 0.9905* (0.9818 to 0.9993) | |
Pregnancy advertising† | 1.0026 (0.9915 to 1.0139) | 0.9994 (0.9880 to 1.0111) | 1.0096 (0.9923 to 1.0274) | 1.0320* (1.0107 to 1.0539) | 0.9864* (0.9741 to 0.9989) | 1.0177* (1.0012 to 1.0344) | 0.9945 (0.9798 to 1.0094) | 1.0065 (0.9849 to 1.0286) | |
TARPs‡§ | 1.0028 (0.9906 to 1.0151) | 1.0061 (0.9936 to 1.0188) | 0.9937 (0.9754 to 1.0124) | 1.0038 (0.9810 to 1.0272) | 1.0020 (0.9885 to 1.0158) | 1.0031 (0.9868 to 1.0197) | 0.9967 (0.9801 to 1.0136) | 1.0079 (0.9841 to 1.0323) | |
Fully adjusted | Time | 0.9988 (0.9958 to 1.0018) | 1.0005 (0.9975 to 1.0035) | 0.9968 (0.9922 to 1.0014) | 1.0000 (0.9946 to 1.0055) | 0.9980 (0.9946 to 1.0015) | 0.9998 (0.9959 to 1.0038) | 1.0005 (0.9963 to 1.0046) | 0.9962 (0.9904 to 1.0020) |
Baby Bonus† | 0.9952 (0.9895 to 1.0010) | 0.9941 (0.9884 to 1.0000) | 0.9973 (0.9884 to 1.0062) | 0.9841* (0.9738 to 0.9946) | 1.0009 (0.9943 to 1.0075) | 0.9950 (0.9874 to 1.0026) | 0.9930 (0.9850 to 1.0011) | 0.9896 (0.9784 to 1.0008) | |
50%and 75% ban and graphic warnings† | 1.0025 (0.9981 to 1.0069) | 1.0022 (0.9977 to 1.0067) | 1.0025 (0.9957 to 1.0093) | 1.0155* (1.0073 to 1.0238) | 0.9962 (0.9912 to 1.0012) | 1.0059* (1.0000 to 1.0119) | 1.0029 (0.9967 to 1.0090) | 1.0129* (1.0041 to 1.0217) | |
100% ban† | 0.9996 (0.9968 to 1.0024) | 0.9992 (0.9964 to 1.0021) | 0.9998 (0.9955 to 1.0041) | 0.9998 (0.9946 to 1.0049) | 0.9995 (0.9963 to 1.0027) | 0.9971 (0.9932 to 1.0009) | 0.9997 (0.9959 to 1.0036) | 0.9992 (0.9938 to 1.0047) | |
Tobacco tax† | 0.9983 (0.9938 to 1.0029) | 1.0001 (0.9954 to 1.0048) | 0.9939 (0.9869 to 1.0010) | 0.9764* (0.9684 to 0.9844) | 1.0107* (1.0054 to 1.0159) | 0.9910* (0.9845 to 0.9975) | 1.0033 (0.9972 to 1.0094) | 0.9907* (0.9822 to 0.9993) | |
Pregnancy advertising† | 1.0027 (0.9916 to 1.0138) | 0.9994 (0.9882 to 1.0109) | 1.0096 (0.9923 to 1.0274) | 1.0322* (1.0116 to 1.0533) | 0.9864* (0.9741 to 0.9988) | 1.0177* (1.0013 to 1.0343) | 0.9945 (0.9800 to 1.0092) | 1.0066 (0.9853 to 1.0283) | |
TARPs‡§ | 1.0045 (0.9923 to 1.0168) | 1.0081 (0.9957 to 1.0208) | 0.9947 (0.9761 to 1.0136) | 1.0092 (0.9869 to 1.0321) | 1.0017 (0.9880 to 1.0157) | 1.0049 (0.9885 to 1.0217) | 0.9991 (0.9825 to 1.0159) | 1.0116 (0.9878 to 1.0359) |
*p<0.05.
#Size of strata do not sum to the size of the overall population due to missing data.
†Represented in the model as a trend indicator term.
‡Entered as a continuous variable.
§Rate ratios for antismoking advertisements represent the change in trend associated with an increase of 1000 TARPs.
SES, socioeconomic status; TARPs, Target Audience Rating Points.