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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

  2007 2008
Male (%, 95% C.I.)   
   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.)   
   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.)*   
   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
  1. *STS = social grade, HSE = NSSEC (household) split Professional/Managerial/Intermediate & Routine/Manual