TABLE 3

Odds Ratios for Different Types and Modalities of Substance Use at 13 Years of Age in the ALSPAC Grouped According to Mutually Adjusted Socioeconomic Position Indicators; Also Adjusted for Age and Gender

SEPNaEver Binge DrinkingWhole Drinking Previous 6 moEver SmokingSmoking Previous 6 mo
OR95% CIPbOR95% CIPbOR95% CIPbOR95% CIPb
Parental social class
    IV–V1711.120.77–1.65.581.100.80–1.53.700.950.65–1.40.280.870.50–1.50.72
    III15651.001.001.001.00
    II21741.050.88–1.251.080.93–1.250.890.75–1.060.970.76–1.23
    I8150.910.71–1.181.020.83–1.250.770.59–1.011.140.80–1.62
    Linear term47250.970.87–1.08.601.010.93–1.11.780.890.80–1.00.051.040.89–1.21.61
Maternal education
    <O level7541.321.07–1.62<.011.271.07–1.51<.011.060.86–1.31<.011.050.80–1.40<.01
    O level17331.001.001.001.00
    A level13630.890.74–1.080.950.82–1.110.800.66–0.970.820.63–1.06
    Degree8750.800.63–1.010.870.72–1.050.630.49–0.810.530.37–0.76
    Linear term47250.850.78–0.93<.0010.890.83–0.96<.010.830.76–0.91<.0010.810.72–0.92.001
Disposable income
    Low6280.790.61–1.03.090.780.64–0.97.031.030.80–1.34.100.970.68–1.37.62
    Middle low8761.090.87–1.361.040.86–1.251.301.04–1.631.180.87–1.60
    Middle9841.001.001.001.00
    Middle high11011.040.83–1.291.050.88–1.260.970.77–1.230.920.68–1.26
    High11361.160.92–1.451.100.91–1.321.080.85–1.371.000.73–1.39
    Linear term47251.061.00–1.13.041.061.01–1.12.010.970.92–1.04.410.980.90–1.06.62
  • Reference categories for categorical terms are shown with an odds ratio of 1.00. OR indicates odds ratio; SEP, socioeconomic position indicator. A whole drink is a can of beer, a glass of wine, a bottle of alcopop, a shot of spirit or any full drink with alcohol in it.

  • a The total number of subjects in each category; these vary slightly for other outcomes.

  • b P values are reported for both categorical and linear terms.