Table 3 Demographic characteristics of the STS, HSE and GLF (percent, 95% confidence interval unless stated)
From: 'The smoking toolkit study': a national study of smoking and smoking cessation in England
| Â | 2007 | 2008 |
|---|---|---|
Male (%, 95% C.I.) | Â | Â |
   STS | 48.5 (47.9 to 49.2) | 48.5 (47.8 to 49.3) |
   GLF | 48.6 (47.7 to 49.5) | 47.1(46.4 to 47.8) |
   HSE | 48.8 (47.9 to 49.7) | 48.8 (48.2 to 49.5) |
   Heterogeneity | X2 = 0.27, p = 0.875 | X2 = 12.7, p = 0.002 |
Age (mean, 95% C.I.) | Â | Â |
   STS | 46.4 (46.1 to 46.7) | 46.3 (46.0 to 46.6) |
   GLF | 46.4 (46.1 to 46.7) | 47.3 (46.7 to 47.9) |
   HSE | 46.4 (45.8 to 47.0) | 46.3 (45.8 to 46.8) |
   Heterogeneity | X2 = 0.00, p = 1.00 | X2 = 5.8, p = 0.056 |
Lower social grade (%, 95% C.I.)* | Â | Â |
   STS | 44.6 (43.9 to 45.2) | 44.5 (43.8 to 45.3) |
   GLF | 40.3 (39.4 to 41.3) | 39.4 (38.0 to 40.8) |
   HSE | 43.0 (41.4 to 44.6) | 42.8 (41.7 to 43.9) |
   Heterogeneity | X2 = 47.7, p < 0.001 | X2 = 38.9, p < 0.001 |