Table 1.
Number of enrolled participants, number eligible, and percentage enrolled by sex, ethnic and racial origin, diabetes status, and treatment group
| All groups n/N (%) |
ILS group n/N (%) |
Metformin group n/N (%) |
Placebo group n/N (%) |
|
|---|---|---|---|---|
| Sex | ||||
| Men | 888/1014 (88%) | 291/333 (87%) | 307/353 (87%) | 290/328 (88%) |
| Women | 1878/2136 (88%) | 619/713 (87%) | 617/696 (89%) | 642/727 (88%) |
| With GDM* | 290/344 (84%) | 93/114 (82%) | 97/110 (88%) | 100/120 (83%) |
| No GDM | 1587/1791 (89%) | 526/599 (88%) | 519/585 (89%) | 542/607 (89%) |
| Ethnic and racial origin | ||||
| White | 1506/1712 (88%) | 490/560 (88%) | 515/582 (88%) | 501/570 (88%) |
| African-American | 559/632 (88%) | 176/199 (88%) | 191/219 (87%) | 192/214 (90%) |
| Hispanic | 424/495 (86%) | 138/171 (81%) | 141/160 (88%) | 145/164 (88%) |
| American Indian | 153/169 (91%) | 53/59 (90%) | 46/52 (88%) | 54/58 (93%) |
| Asian American or Pacific Islander | 124/142 (87%) | 53/57 (93%) | 31/36 (86%) | 40/49 (82%) |
| Diabetes† | ||||
| No | 1999/2310 (87%) | 739/855 (86%) | 652/752 (87%) | 608/703 (86%) |
| Yes | 767/840 (91%) | 171/191 (90%) | 272/297 (92%) | 324/352 (92%) |
Data are number of participants enrolled/number eligible (%).
ILS=intensive lifestyle intervention.
Eligible participants are all those randomly assigned to DPP minus those who died or withdrew consent.
*
GDM (history of gestational diabetes) classification was missing for one woman in the metformin group.
†
Not diabetic or had diabetes confirmed according to DPP protocol as of Sept 1, 2002. Enrolment was higher in participants with diabetes than in non-diabetic participants, both overall and in the metformin and placebo treatment groups.