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Table 2 Calculated change in weight in kgs at 6 and 12 months (excluding outliers)a

From: Simultaneous vs. sequential treatment for smoking and weight management in tobacco quitlines: 6 and 12 month outcomes from a randomized trial

  Control N = 369 Sequential N = 338 Simultaneous N = 312 Statistics
6-month outcomes
 Mean (sd), se (Multiply Imputed) n = 2374 −0.22 (6.9), 0.39 0.75 (7.8), 0.41 0.004 (7.5), 0.38 F(2, 106) = 1.52; p = 0.22
 Mean (sd), se (completers) n = 1019 0.11 (5.4), 0.28 0.60 (5.99), 0.23 0.19 (5.5), 0.31 F(2, 1016 = 0.75; p = 0.47
 Mean (sd), se (among abstinent n = 521 0.35 (5.8), 0.42 0.56 (6.2), 0.46 0.45 (6.0), 0.49 F(2, 518) = 0.06, p = 0.94
12-month outcomes
 Multiple imputation: Mean (sd), se (all n = 2520) −0.22 (9.2), 0.40 0.41 (9.4), 0.40 0.40 (7.9), 0.36 F2(2, 264) = 0.87;p = 0.42
 Mean (sd), se (completers) n = 1399 −0.18 (8.4), 0.38 0.34 (8.2), 0.38 0.27 (7.4), 0.34 F(2, 1396) = 0.58, p = 0.56.
 Mean (sd), se (among abstinent n = 628 −0.38 (9.7), 0.65 0.44 (9.7), 0.63 0.40 (8.2), 0.59 F(2, 625) = 0.57; p = 0.57
  1. a sd = standard deviation; se = standard error
  2. Note: at 6 months 13.9% lost > 4.5 kg and 23.3% gained > 4.5 kg
  3. Also, for multiple imputation the df is completely different than the number of observations Note: at 12 months 19% lost > 4.5 kg and 26% gained > 4.5 kg