Table 2 Determination of serum thiocyanate at the last examination, by category of smoking
Sustained never smokers“Starters”Sustained ex-smokers“Resumers”Sustained smokers“Quitters”p Value† (two-sided)
Men (n = 4787):*
Number of participants814165691632688537
Mean (SD) serum thiocyanate (μmol/litre)26.2 (11.5)41.4 (15.6)25.4 (13.0)56.9 (22.0)65.6 (22.8)27.0 (14.3)0.25
Women (n = 4654):*
Number of participants1819342971302046328
Mean (SD) serum thiocyanate (μmol/litre)26.7 (11.6)45.0 (19.4)29.1 (14.2)61.7 (28.4)74.5 (25.8)33.0 (17.9)0.001
  • *Participants not reporting cardiovascular disease, diabetes or treatment for hypertension, or symptoms of angina pectoris or atherosclerosis obliterans; †p values represent differences between the sustained ex-smokers and the sustained never smokers.