Table 1.
Demographic characteristics of participants in training and testing data sets
| Training Set | Testing Set | |||
|---|---|---|---|---|
| Variable | Level | NonSMK (N=10,717) | NonSMK (N=10,746) | SMK (N=2,161) |
| BMI (kg/m2) | Mean (SE) | 26.30 (4.08×10−2) | 26.26 (4.02×10−2) | 26.48 (8.70×10−2) |
| Age (years) | Mean (SE) | 54.30 (7.15×10−2) | 54.28 (7.12×10−2) | 53.08 (1.57×10−2) |
| Townsend deprivation index at recruitment | Mean (SE) | −2.13 (2.57) | −2.18 (2.54) | −0.90 (3.19) |
| Age completed full time education (years) | Mean (SE) | 17.28 (2.34) | 17.27 (2.35) | 16.94 (2.35) |
| Average total household income before tax (n, %) | Less than 18,000 | 930 (8.68) | 899 (8.37) | 145 (6.71) |
| 18,000 to 30,999 | 1023 (9.55) | 1038 (9.66) | 314 (14.53) | |
| 31,000 to 51,999 | 2012 (18.77) | 2017 (18.77) | 455 (21.06) | |
| 52,000 to 100,000 | 2883 (26.9) | 3042 (28.31) | 635 (29.38) | |
| Greater than 100,000 | 3012 (28.1) | 2872 (26.73) | 495 (22.91) | |
| Do not know/ Prefer not to answer | 838 (7.82) | 803 (7.47) | 105 (4.86) | |
| Sex (n, %) | Female (%) | 6009 (56.07) | 5978 (55.63) | 972 (44.98) |
| Male (%) | 4708 (43.93) | 4768 (44.37) | 1189 (55.02) | |
| Hypertension (n, %) | Yes (%) | 1213 (11.32) | 1252 (11.65) | 259 (11.98) |
| No (%) | 9504 (88.68) | 9494 (88.35) | 1902 (88.01) | |
| Diabetes (n, %) | Yes (%) | 33 (3.08×10−3) | 43 (4.00×10−3) | 12 (5.55×10−3) |
| No (%) | 10684 (0.99) | 10703 (0.99) | 2149 (0.99) | |
| Stroke (n, %) | Yes (%) | 93 (8.68×10−3) | 86 (8.00×10−3) | 25 (1.16×10−3) |
| No (%) | 10660 (0.99) | 10624 (0.99) | 2136 (0.99) | |
SE = standard error; n = frequency; % = percentage within each column; NonSMK = non-smoker; SMK = smoker.