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. 2014 Apr 23;4(4):e004958. doi: 10.1136/bmjopen-2014-004958

Table 2.

Percentages within each smoking status for THIN and the HSE 2008 after various adjustments

Category THIN
HSE
Complete records (%) After MAR MI (%)*† After MNAR MI (%)*‡ Observed (%) Reclassifying ex-smokers (%)§
Non-smoker 55 53 57 53 57
Ex-smoker 17 22 23 26 22
Smoker 28 25 20 21 21

*Directly standardised using the HSE age distribution as standard.

†Imputed assuming that missing values are smokers, non-smokers or ex-smokers.

‡Imputed assuming that missing values are non-smokers or ex-smokers.

§Within each age group, reclassifying the optimum number of ex-smokers as non-smokers based on the distributions shown after MNAR MI.

HSE, Health Survey for England 2008; MAR, missing at random; MI, multiple imputation; MNAR, missing not at random; THIN, The Health Improvement Network.