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Table 1 The effect of researcher distributing questionnaires, age, sex and availability of health promotion payment within SIS on recording of smoking advice in patient's medical records (from a multi-level logistic regression model)

From: Distributing questionnaires about smoking to patients: impact on general practitioners' recording of smoking advice

  Odds ratio (95% CI)
Researcher distributing questionnaires  
No 1
Yes 1.78 (1.36 to 2.34)
Males 1
Female 1.16 (0.91 to 1.48)
Age (in quartiles)  
0 to 24 1
24 to 40 2.79 (1.98 to 3.94)
40 to 59 2.12 (1.48 to 3.04)
59 to 93 1.19 (0.80 to 1.78)
Payment available in SIS study  
No 1
Yes 0.90 (0.68 to 1.18)