Table 2

Change from baseline in participant characteristics at the end of the 8-week trial and at follow-up at week 16 by treatment group1
n2 wk8/wk16 Baseline Week 8 p Week 16 p
Body weight, kg*
 Peanut 23/23 87.0 ± 3.9 −0.2 ± 0.3 0.033 0.2 ± 0.5 0.196
 Grain bar 21/19 82.5 ± 3.7 −1.3 ± 0.4 −1.0 ± 0.6
Body fat, %*
 Peanut 23/23 40.0 ± 1.7 −0.4 ± 0.3 0.429 −0.5 ± 0.3 0.089
 Grain bar 21/19 40.6 ± 1.3 −0.7 ± 0.4 −1.6 ± 0.5
Waist circumference, cm*
 Peanut 22/20 104.6 ± 2.9 −4.1 ± 1.1 0.254 −5.9 ± 1.6 0.495
 Grain bar 21/18 99.5 ± 2.2 −1.5 ± 1.0 −4.4 ± 1.2
Serum fasting glucose, mmol/L
 Peanut 23/21 5.5 ± 0.4† −0.4 ± 0.3 0.254 −0.4 ± 0.3 0.554
 Grain bar 21/18 5.0 ± 0.5 −0.1 ± 0.1 −0.02 ± 0.12
Hemoglobin A1c, %*
 Peanut 22/20 5.67 ± 0.27 −0.18 ± 0.12 0.001 −0.16 ± 0.15 0.159
 Grain bar 21/18 5.35 ± 0.10 −0.25 ± 0.07 −0.07 ± 0.06
Serum fasting insulin, uM
 Peanut 23/21 22.5 ± 2.7 −1.5 ± 2.5 0.226 9.9 ± 13.3 0.632
 Grain bar 21/18 20.8 ± 4.5 −6.5 ± 3.9 −7.1 ± 4.8

1Data represent mean ± SE. P values for ANCOVA with baseline value as covariate; data not normally distributed (glucose and insulin) assessed for change by treatment using non-parametric Mann–Whitney test. *Indicates significant time effect at week 8 (repeated measures ANOVA). †Indicates significant difference at baseline between groups. 2Data shown for participants completing the 8-week trial (n = 23 and 21 for peanut and grain bar groups respectively). Reduced sample sizes indicate attrition at follow-up and/or missing data point.

Johnston et al.

Johnston et al. Nutrition Journal 2013 12:35   doi:10.1186/1475-2891-12-35

Open Data