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. 2014 May 5;4(5):e116. doi: 10.1038/nutd.2014.12

Table 2. Mean (s.d.) weight (kg) showing weight change according to intervention type and baseline BMI (HW and) using ITT analysis.

Data collection point Group MI SDI Unadjusted difference P-value (95% CI) Difference at 12 months (adjusted) P-value (95% CI)
Baseline group 68.7 (7.9) 68.7 (8.9) 68.6 (6.7) 0.982 (−4.30; 4.39) __
 HW only 62.9 (5.3) 62.0 (6.4) 63.9 (3.7) 0.373 (−6.01; 2.36) __
 OW only 74.4 (5.5) 75.3 (5.4) 73.4 (5.6) 0.365 (−2.41; 6.32) __
           
3 Months group 67.5 (8.0) 67.3 (8.9) 67.7 (7.1) 0.863 (−4.80; 4.03) __
 HW only 61.5 (5.1) 60.6 (5.9) 62.5 (4.0) 0.356 (−5.86; 2.19) __
 OW only 73.4 (5.6) 73.9 (5.9) 72.9 (5.5) 0.629 (−3.44; 5.58) __
           
12 Months group 66.5 (7.7) 65.6 (8.5) 67.4 (6.7) 0.402 (−5.99; 2.44) 0.034 (−3.490; −0.145)
 HW only 61.6 (5.3) 59.5 (5.4) 63.8 (4.4) 0.032 (−8.23; −0.40) 0.002 (−4.383; −1.085)
 OW only 71.5 (6.4) 71.8 (6.3) 71.1 (6.8) 0.764 (−4.42; 5.95) 0.467 (−4.258; 2.011)

Abbreviations: BMI, body mass index; CI, confidence interval; HW, healthy weight; OW, overweight; MI, motivational interviewing; s.d., standard deviation; SDI, self-directed intervention; ITT, intention to treat.

Baseline: group—N=54, MI=28, SDI=26; HW—N=27, MI=14, SDI=13; OW—N=27, MI=14, SDI=13.

3 Months: group—N=49, MI=26, SDI=23; HW—N=25, MI=14 SDI=11; OW—N=22, MI=12, SDI=10.

12 Months: group—N=40, MI=22, SDI=18; HW—N=24, MI=14, SDI=10; OW—N=16, MI=8, SDI=8.