Table 1

Comparison of sample with national data for prevalence of smoking

Age group (years)Present studyNational survey8
nPer cent smokers95% CInPer cent smokers95% CI
16–19 5939.026.6 to 51.4 31730.025.0 to 35.0
20–2415444.236.4 to 52.0 45933.329.0 to 37.6
25–29 8858.047.7 to 68.3 51734.830.7 to 38.9
30–34 4462.548.2 to 76.8 60733.429.6 to 37.2
Total3451-150 49.344.0 to 54.6190033.231.1 to 35.3
  • 1-150 29 respondents aged 35–56 years omitted from the table because of small age specific numbers.

  • χ2 = 118.9, df = 2, p < 0.0001.

  • CI, confidence interval.