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Table 4 Mean BMI, weight, TSF, and MUAMC at baseline and at 5 months (follow-up) by group and the intervention effects in female Cambodian garment workersa

From: Impact of lunch provision on anthropometry, hemoglobin, and micronutrient status of female Cambodian garment workers: exploratory randomized controlled trial

  Group Intervention effect
Intervention Control Mean difference Cohen’s d p
BMI, kg/m2
 Baseline 19.8 ± 2.4b 19.9 ± 2.4
 At 5 months, unadjusted 19.9 ± 2.3 19.9 ± 2.4
 At 5 months, adjusted 20.0 (19.8, 20.2)c 19.9 (19.7, 20.0) 0.1 (− 0.1, 0.4) 0.17 0.27
Weight, kg
 Baseline 46.0 ± 6.1 47.4 ± 6.3
 At 5 months, unadjusted 46.4 ± 5.9 47.6 ± 5.9
 At 5 months, adjusted 47.0 (46.7, 47.4) 46.9 (46.5, 47.3) 0.1 (−0.4, 0.7) 0.06 0.64
TSF, mm
 Baseline 15.4 ± 4.5 15.4 ± 4.8
 At 5 months, unadjusted 15.6 ± 4.7 15.2 ± 4.6
 At 5 months, adjusted 15.6 (15.1, 16.0) 15.2 (14.7, 15.7) 0.4 (−0.3, 1.1) 0.18 0.24
MUAMC, cm
 Baseline 19.1 ± 1.4 19.2 ± 1.6
 At 5 months, unadjusted 19.1 ± 1.5 19.3 ± 1.5
 At 5 months, adjusted 19.2 (19.0, 19.3) 19.3 (19.1, 19.4) −0.1 (−0.3, 0.1) −0.14 0.35
  1. BMI Body mass index, TSF Triceps skinfold thickness, MUAMC Mid-upper arm muscle circumference
  2. aTotal n = 172 (completed the follow-up, n = 86 intervention and n = 86 control). A general linear model with adjustments for baseline values was used to predict marginal means (95% CIs) for each outcome variable and to estimate intervention effects as corresponding marginal mean differences (95% CIs) including an estimated standardized effect size (Cohen’s d)
  3. bMean ± SD (all such values)
  4. cMarginal mean, 95% CI in parentheses (all such values)