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Table 2—

Quitting smoking recorded at Q5 (5 years after screening), BMI and weight change at Q5, and adjusted relative risk of type 2 diabetes over the subsequent 11.8-year follow-up

Smoking groupnPercentage of weight gain
Mean weight gainBMI
Adjusted relative risk of diabetes (95% CI)
Any>10%Q1Q5AB§
Never-smokers* 1,576 25.9 3.9 7.1 25.49 25.75 1.00 1.00 
Continuing smokers 1,980 32.2 7.2 8.3 24.90 25.26 1.59 (1.04, 2.43) 1.61 (1.05, 2.46) 
Secondary pipe/cigar smokers 430 31.6 6.7 7.9 25.46 25.82 2.16 (1.26, 3.71) 2.15 (1.24, 3.70) 
Ex-smokers at Q1 and Q5 1,643 25.6 3.2 7.1 25.92 26.12 1.43 (0.93, 2.18) 1.45 (0.95, 2.21) 
Recent ex-smokers (smokers at Q1, ex-smokers at Q5) 567 54.3 19.2 9.4 25.07 26.24 2.34 (1.41, 3.88) 2.03 (1.22, 3.37) 
Smoking groupnPercentage of weight gain
Mean weight gainBMI
Adjusted relative risk of diabetes (95% CI)
Any>10%Q1Q5AB§
Never-smokers* 1,576 25.9 3.9 7.1 25.49 25.75 1.00 1.00 
Continuing smokers 1,980 32.2 7.2 8.3 24.90 25.26 1.59 (1.04, 2.43) 1.61 (1.05, 2.46) 
Secondary pipe/cigar smokers 430 31.6 6.7 7.9 25.46 25.82 2.16 (1.26, 3.71) 2.15 (1.24, 3.70) 
Ex-smokers at Q1 and Q5 1,643 25.6 3.2 7.1 25.92 26.12 1.43 (0.93, 2.18) 1.45 (0.95, 2.21) 
Recent ex-smokers (smokers at Q1, ex-smokers at Q5) 567 54.3 19.2 9.4 25.07 26.24 2.34 (1.41, 3.88) 2.03 (1.22, 3.37) 
*

Includes primary pipe and cigar smokers;

only in men who gained >4% body weight;

A, adjusted for age, physical activity, social class, alcohol intake at screening, quitting drinking alcohol, preexisting CHD, antihypertensive treatment at Q5, and initial BMI;

§

B, as A, but adjusted for BMI at Q5 rather than initial BMI.

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