Clinical Study

Baseline Obesity Status Modifies Effectiveness of Adapted Diabetes Prevention Program Lifestyle Interventions for Weight Management in Primary Care

Table 2

Baseline characteristics of the study participantsa.

CharacteristicAllUsual careCoach-ledSelf-directed (degree of freedom) value

Body mass index 25 ≤ 30
 Age, year53.8 ± 10.553.7 ± 10.354.7 ± 10.953.1 ± 10.60.22 (2, 108)0.80
 Female, %32.432.433.331.60.03 (2)0.99
 Race/ethnicity, %3.29 (6)0.77
  Non-Hispanic white72.175.766.773.7
  Asian/Pacific Islander22.518.927.821.1
  Latino/Hispanic4.55.45.62.6
  College level or above, %97.297.294.3100.02.22 (2)0.33
 Income, %6.62 (6)0.36
  <$75,00010.313.98.88.1
  $75,000–$124,99930.827.841.224.3
  $125,000–$149,99915.98.320.618.9
  $150,000+43.050.029.448.6
 Weight, kg83.8 ± 9.985.4 ± 9.182.6 ± 10.283.5 ± 10.60.77 (2, 108)0.46
 Waist, cm98.8 ± 6.498.3 ± 6.498.0 ± 6.4100.1 ± 6.41.14 (2, 108)0.32
 Fasting plasma glucose, mg/dL100.3 ± 9.399.9 ± 9.5101.4 ± 9.399.6 ± 9.20.39 (2, 108)0.68
 Prediabetes, %56.862.261.147.42.08 (2)0.35
 Metabolic syndrome, %80.267.688.984.25.81 (2)0.06
 Prediabetes and metabolic syndrome, %36.929.750.031.63.93 (2)0.14

Body mass index 30 ≤ 35
 Age, year54.0 ± 10.854.5 ± 11.155.3 ± 12.952.3 ± 7.90.51 (2, 72)0.60
 Female, %50.744.050.058.31.01 (2)0.60
 Race/ethnicity, %5.25 (6)0.51
  Non-Hispanic white80.080.080.879.2
  Asian/Pacific Islander14.716.07.720.8
  Latino/Hispanic4.04.07.70.0
 College level or above, %97.396.096.2100.00.97 (2)0.62
 Income, %5.16 (6)0.52
  <$75,00012.58.715.413.0
  $75,000–$124,99923.630.423.117.4
  $125,000–$149,9999.70.015.413.0
  $150,000+54.260.946.256.5
 Weight, kg94.2 ± 13.894.2 ± 12.997.2 ± 14.591.0 ± 13.81.26 (2, 72)0.29
 Waist, cm106.7 ± 8.1106.2 ± 8.9109.2 ± 7.1104.4 ± 7.92.35 (2, 72)0.10
 Fasting plasma glucose, mg/dL100.3 ± 10.498.7 ± 8.6100.4 ± 10.9101.8 ± 11.60.52 (2, 72)0.60
 Prediabetes, %50.744.050.058.31.01 (2)0.60
 Metabolic syndrome, %88.092.080.891.71.97 (2)0.37
 Prediabetes and metabolic syndrome, %38.736.030.850.02.06 (2)0.36

Body mass index 35+
 Age, year49.7 ± 10.147.4 ± 10.653.4 ± 8.548.6 ± 10.41.79 (2, 52)0.18
 Female, %69.173.776.557.91.74 (2)0.42
 Race/ethnicity, %2.58 (4)0.63
  Non-Hispanic white87.378.994.189.5
  Asian/Pacific Islander9.115.85.95.3
  Latino/Hispanic3.65.30.05.3
 College level or above, %98.294.7100.0100.01.93 (2)0.38
  Income, %5.15 (6)0.52
  <$75,00014.810.523.511.1
  $75,000–$124,99922.226.329.411.1
  $125,000–$149,99913.010.55.922.2
  $150,000+50.052.641.255.6
 Weight, kg113.4 ± 18.2116.0 ± 20.0111.6 ± 15.0112.6 ± 19.40.29 (2, 52)0.75
 Waist, cm120.1 ± 10.9121.9 ± 11.7117.3 ± 9.7120.4 ± 11.40.78 (2, 52)0.46
 Fasting plasma glucose, mg/dL98.7 ± 8.698.7 ± 8.798.7 ± 9.398.8 ± 8.30.00 (2, 52)0.99
 Prediabetes, %54.552.658.852.60.18 (2)0.91
 Metabolic syndrome, %98.2100.094.1100.02.28 (2)0.32
 Prediabetes and metabolic syndrome, %52.752.652.952.60.0005 (2)0.99

Plus-minus values are means ± SD.