Table 1

Look AHEAD and DPP (weight-loss sample) participant characteristics

Look AHEADDPP
CharacteristicsTotal
(N = 3,906)Comparison
(N = 1,892)Lifestyle
(N = 2,014)Total
(N = 1,824)Comparison
(N = 907)Lifestyle
(N = 917)
Women (%)2,251 (57.6)1,081 (57.1)1,170 (58.1)1,241 (68.0)623 (68.7)618 (67.4)
Successful weight losers (%)2,116 (54.2)475 (25.1)1,641 (81.5)834 (45.7)201 (22.2)633 (69.0)
Age (years)59 (6.8)59.1 (6.8)58.9 (6.8)50.7 (10.9)50.7 (10.4)50.7 (11.4)
Ethnicity (%)
 African American586 (15.0)280 (14.8)306 (15.2)371 (20.3)190 (21.0)181 (19.7)
 American Indian/Alaskan Nativea81 (2.1)41 (2.2)40 (2.0)56 (3.1)28 (3.1)28 (3.1)
 Asian/Pacific Islander26 (0.7)10 (0.5)16 (0.8)89 (4.9)37 (4.1)52 (5.7)
 Non-Hispanic white2,747 (70.3)1,350 (71.4)1,397 (69.4)991 (54.3)499 (55.0)492 (53.7)
 Hispanic/Latino392 (10.0)173 (9.1)219 (10.9)317 (17.4)153 (16.9)164 (17.9)
 Other (multiple)74 (1.9)38 (2.0)36 (1.8)
BMI (kg/m2)36.1 (5.9)36.2 (5.8)36 (6.1)34.1 (6.7)34.3 (6.7)34.0 (6.7)
Weight (kg)
 Overall Sample
  Baseline101.8 (19.2)102.2 (18.7)101.4 (19.6)94.6 (20.2)94.8 (19.9)94.4 (20.5)
  Year 196.7 (19.4)101.4 (18.9)92.4 (18.9)90.8 (20.5)94.3 (20.4)87.3 (19.9)
  Year 297.6 (19.4)100.9 (18.8)94.6 (19.4)91.6 (20.6)94.7 (20.3)88.5 (20.5)
  Year 398.3 (19.5)100.8 (19.1)96.0 (19.6)92.8 (21.2)95.1 (20.4)90.5 (21.8)
  Year 498.4 (19.6)100.6 (19.2)96.3 (19.7)94.1 (21.3)95.6 (18.4)92.7 (23.6)
 Women
  Baseline96.0 (17.5)96.4 (17.4)95.6 (17.7)92.9 (20.4)93.1 (20.1)92.7 (20.7)
  Year 191.4 (17.9)95.6 (17.6)87.5 (17.3)89.2 (20.7)92.5 (20.9)86.0 (20.1)
  Year 292.3 (18.0)95.1 (17.6)89.7 (18.0)90.1 (20.8)93.0 (20.6)87.0 (20.5)
  Year 392.8 (17.9)94.7 (17.4)91.1 (18.1)91.7 (21.5)93.4 (20.5)90.0 (22.2)
  Year 492.7 (17.9)94.5 (17.7)91.1 (18.0)94.7 (22.5)95.9 (18.8)93.5 (25.5)
 Men
  Baseline109.7 (18.6)109.8 (17.7)109.6 (19.3)98.3 (19.3)98.5 (18.9)98.1 (19.8)
  Year 1104.0 (19.0)109.0 (17.8)99.2 (18.9)94.1 (19.4)98.2 (18.7)90.2 (19.3)
  Year 2104.9 (18.8)108.4 (17.6)101.4 (19.4)94.9 (19.8)98.4 (19.0)91.5 (20.1)
  Year 3105.8 (19.2)108.9 (18.2)102.8 (19.6)95.0 (20.6)98.5 (19.7)91.7 (20.9)
  Year 4106.1 (19.1)108.8 (18.1)103.6 (19.7)93.0 (18.8)94.9 (17.9)91.2 (19.5)
  • All variables summarized in mean (SD) format, unless indicated otherwise.

  • aThe number of American Indian participants included in this study is lower than in the parent Look AHEAD trial due to lack of institutional review board approval.

  • †This is the weight-regain analysis subsample that achieved at least 3% weight loss at year 1 (see the separate demographics table for this subsample in Table 2).