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Table 3 Contingency table for the comparison between WHS 2013 and 2014 data and the same individuals in GP data. Full algorithm as presented here

From: Development of an algorithm for determining smoking status and behaviour over the life course from UK electronic primary care records

 

WHS

Totals

GP

Missing data

smoker

Ex-smoker

Never smoker

Missing data

<5

89

120

199

413

Smoker

17

1040

426

209

1692

Ex-smoker

34

130

1449

1104

2717

Never smoker

16

42

186

1770

2014

Totals

72

1301

2181

3282

6836