Table 2

Participants’ attendance and percent body weight lost (unadjusted) by number of sessions attended among eligible* participants enrolled in the lifestyle change program

Percent of body weight lost from first to last session attended among those reporting at least 2 weights (94.2% of 14,747)Percent achieving weight loss goal of ≥5%, n = 13,893§Odds ratios for meeting 5% goalP value#
Sessions attended, n = 14,747All eligible participants, n = 13,893§Participants not meeting the threshold, n = 1,118Participants meeting the threshold, n = 12,775
Median (25th, 75th)Median (25th, 75th)Median (25th, 75th)Median (25th, 75th)
Total14 (7, 19)3.1 (0.8, 6.7)0.4 (+0.3, 1.2)3.6 (1.1, 7.1)35.5
Sex
 Male**14 (8, 19)3.8 (1.1, 7.4)0.4 (+0.2, 1.4)4.1 (1.4, 7.7)40.0
 Female14 (7, 19)3.0 (0.7, 6.5)0.4 (+0.3, 1.2)3.4 (1.0, 6.9)34.50.788<0.0001
Age group (years)
 18–44**12 (5, 16)2.2 (0.3, 5.4)0.3 (+0.5, 1.1)2.7 (0.5, 5.9)27.5
 45–6414 (7, 18)3.1 (0.8, 6.7)0.4 (+0.1, 1.3)3.5 (1.1, 7.0)35.01.4220.8756
 65+16 (10, 20)4.1 (1.4, 7.6)0.4 (+0.2, 1.1)4.4 (1.8, 7.9)43.11.999<0.0001
Race/ethnicity
 Hispanic11 (4, 16)2.5 (0.5, 5.9)0.4 (+0.4, 1.3)3.0 (0.9, 6.5)30.80.5830.1352
 Non-Hispanic/white only**16 (10, 20)4.1 (1.4, 7.8)0.5 (+0.3, 1.3)4.4 (1.7, 8.0)43.2
 Non-Hispanic/black only13 (7, 18)2.2 (0.3, 5.3)0.4 (0.0, 1.3)2.6 (0.5, 5.7)27.10.489<0.0001
 Other12 (6, 16)2.6 (0.4, 5.7)0.4 (+0.2, 1.1)3.0 (0.8, 6.3)29.10.540<0.0001
Baseline BMI (kg/m2)
 <25**14 (7, 19)2.8 (0.8, 6.0)0.9 (0.0, 1.4)3.2 (0.9, 6.1)30.8
 25–2914 (8, 19)3.4 (0.9, 6.8)0.5 (0.0, 1.2)3.8 (1.2, 7.1)37.21.3520.0115
 ≥3014 (8, 19)3.1 (0.8, 6.8)0.4 (+0.3, 1.2)3.6 (1.1, 7.2)35.91.2890.1030
Eligibility category
 Entered program with blood test/history of GDM**14 (7, 19)3.2 (0.8, 6.8)0.4 (+0.2, 1.3)3.7 (1.2, 7.1)36.1
 Entered program on risk test only14 (8, 18)3.0 (0.7, 6.6)0.3 (+0.3, 1.1)3.4 (1.0, 7.0)34.60.9380.0834
  • *A participant’s eligibility was based on the results of a blood-based test (A1C, FBG, or OGTT), their score on the CDC’s or the ADA’s prediabetes risk test, or a history of GDM.

  • †Participants must have been enrolled between February 2012 and January 2015 in a program that held sessions for at least 12 months after their enrollment and attended at least one session.

  • ‡Among all eligible participants who attended at least one session.

  • §Among all eligible participants who reported at least two weights.

  • ‖Participants who attended less than four sessions.

  • ¶Participants who attended four or more sessions.

  • #Results are based on Pearson χ2 test for categorical variables and two-sample Student t test for continuous variables.

  • **Reference group for bivariate analysis.