Table 1 Baseline characteristics of analytic sample
From: Dynamic risk prediction for diabetes using biomarker change measurements
|  | Overall (N = 2057) N(%) or Mean (SD) | Placebo (N = 1027) N(%) or Mean (SD) | Metformin (N = 1030) N(%) or Mean (SD) |
|---|---|---|---|
Age | |||
 < 40 | 286 (13.9%) | 151 (14.7%) | 135 (13.1%) |
 40–44 | 306 (14.9%) | 147 (14.3%) | 159 (15.5%) |
 45–49 | 422 (20.5%) | 231 (22.4%) | 191 (18.6%) |
 50–54 | 376 (18.3%) | 167 (16.2%) | 209 (20.4%) |
 55–59 | 255 (12.4%) | 134 (13%) | 121 (11.8%) |
 60–64 | 201 (9.8%) | 100 (9.7%) | 101 (9.8%) |
 65+ | 211 (10.3%) | 100 (9.7%) | 111 (10.8%) |
Gender | |||
 Male | 689 (33.5%) | 174 (33.8%) | 186 (36.3%) |
 Female | 1368 (66.5%) | 699 (67.9%) | 669 (65.1%) |
BMI | |||
 < 30 kg/m2 | 665 (32.3%) | 326 (31.7%) | 339 (33%) |
 ≥ 30 to < 35 kg/m2 | 620 (30.1%) | 297 (28.8%) | 323 (31.5%) |
 ≥ 35 kg/m2 | 772 (37.5%) | 407 (39.5%) | 365 (35.5%) |
Smoking Status | |||
 Yes | 136 (6.6%) | 71 (6.9%) | 65 (6.3%) |
 No | 1764 (85.8%) | 878 (85.2%) | 886 (86.3%) |
 Not available | 157 (7.6%) | 81 (7.9%) | 76 (7.4%) |
Race/ethnicity | |||
 White | 1188 (57.8%) | 586 (56.9%) | 602 (58.6%) |
 Black | 440 (21.4%) | 219 (21.3%) | 221 (21.5%) |
 Hispanic | 330 (16%) | 168 (16.3%) | 162 (15.8%) |
 Other | 99 (4.8%) | 57 (5.5%) | 42 (4.1%) |
Fasting plasma glucose (mg/dL) | 107.35 (7.84) | 107.42 (7.83) | 107.27 (7.86) |
Hemoglobin A1c (%)a | 5.91 (0.51) | 5.91 (0.5) | 5.91 (0.51) |