From: Development of an algorithm for determining smoking status and behaviour over the life course from UK electronic primary care records
GP data algorithm
Two status solution
Three status solution
Full algorithm
0.64 (0.62, 0.66)
0.50 (0.48, 0.52)
Full algorithm without temporal checking
0.61 (0.59, 0.64)
0.62 (0.61, 0.64)
Nearest status
0.78 (0.76, 0.80)
0.71 (0.70, 0.73)