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Characteristics of datasets used for machine learning.
| Characteristic | Training and test samples (N = 2,934) |
Independent test sample (N = 437) |
|---|---|---|
| Mean age (years) | 42.8 ± 13.5 | 39.8 ± 13.3 |
| Females (%) | 1,590 (54.2) | 218 (49.9) |
| No. smokers (%) | 1,431 (48.8) | 213 (48.7) |
