Skip to main content

Table 2 Mean changes in weight and secondary outcomes from 12 (post-intervention) to 24 months by group

From: The effects of if-then plans on weight loss: results of the 24-month follow-up of the McGill CHIP Healthy Weight Program randomized controlled trial

 Standard GLB (n = 59)Enriched GLB (n = 51)χ2p
Mean (SE)ZpR295% CIMean (SE)zpR295% CI
Primary outcome
 Weight (lbs.)5.58 (5.26)1.06.2890.01−4.74, 15.8910.78 (5.94)1.81.0700.03−0.87, 22.430.43.514
Diabetes risk factors
 Waist circumference (cm)−0.24 (2.46)− 0.10.9230.00−5.06, 4.591.00 (2.84)0.35.7240.00−4.57, 6.570.11.742
Physical activity
 Physical activity total duration (min/week)42.62 (49.17)0.87.3860.01− 53.75, 138.9912.08 (97.05)0.12.9010.00− 178.15, 202.310.07.788
 Physical activity pedometer steps (per day)993.27 (93.00)1.07.2860.02− 829.54, 2816.08− 1131.73 (59.76)−1.89.0580.06− 2302.93, 394.703.21.073
 Physical activity step equivalents (per day)1413.76 (158.14)0.89.3710.01− 1685.78, 4513.30− 2210.32 (203.84)−1.08.2780.02− 6205.51, 1784.871.16.282
Self-Monitoring index
 Food tracking frequency (days/week)−0.61 (0.30)−2.02.0440.02−1.21, − 0.02− 0.43 (0.22)−1.90.0580.02− 0.86, 0.010.25.620
 Activity tracking frequency (days/week)−1.26 (0.35)−3.59<.0010.07−1.95, −0.57−0.95 (0.34)−2.85.0040.05−1.61, −0.300.40.528
Behavior change index
 Average fat intake (grams/day)3.54 (3.13)1.13.2580.01−2.59, 9.672.34 (3.58)0.65.5130.01−4.67, 9.350.06.801
 Average caloric intake (per day)18.85 (72.90)0.26.7960.00− 124.03, 161.73−39.18 (80.68)−0.49.6270.00− 197.43, 118.950.29.593
Habit strength index
 Total score−0.46 (0.25)−1.86.0630.03−0.94, 0.03−0.42 (0.23)−1.81.0700.03−0.88, 0.030.01.910