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Table 2 Effect of HealthCorps on BMI z-score, and overweight/obesity and obesity prevalence stratified by sex and baseline weight status

From: Effective nationwide school-based participatory extramural program on adolescent body mass index, health knowledge and behaviors

BMI z-score

  

HealthCorps (Est±SE)

Comparison(Est±SE)

Sex

Baseline Weight Status

N

Pre

Post

Post–Pre delta

p

N

Pre

Post

Post–Pre delta

p

Males

Normal

242

−0.23±0.08

−0.09±0.08

0.13±0.04

0.001

91

−0.10±0.11

0.10±0.11

0.20±0.06

0.002

Ow/Ob

109

1.68±0.08

1.61±0.08

−0.07±0.05

0.140

34

1.75±0.11

1.70±0.11

−0.05±0.08

0.513

Obese

50

1.99±0.06

1.94±0.06

−0.05±0.07

0.496

18

2.08±0.12

1.93±0.12

−0.15±0.11

0.191

All

351

0.36±0.09

0.44±0.09

0.08±0.04

0.013

125

0.47±0.14

0.60±0.14

0.14±0.05

0.008

Females

Normal

177

−0.04±0.06

0.03±0.06

0.07±0.04

0.069

68

−0.21±0.10

−0.20±0.10

0.02±0.06

0.728

Ow/Ob

83

1.60±0.07

1.44±0.07

−0.16±0.05

0.004

28

1.58±0.10

1.55±0.11

−0.03±0.09

0.707

Obese

33

1.98±0.08

1.74±0.08

−0.23±0.10

0.028

12

1.94±0.12

1.91±0.12

−0.04±0.17

0.825

All

260

0.49±0.12

0.50±0.12

0.01±0.03

0.753

96

0.31±0.11

0.32±0.11

0.01±0.05

0.772

Overweight/obesity and obesity rates

HealthCorps

Comparison

Sex

Weight Status

Pre%

Post%

OR of Post vs. Pre (95% CI)

p

Pre%

Post%

OR of Post vs. Pre (95% CI)

p

Males

Ow/Ob

31.1%

31.3%

1.05 (0.73, 1.53)

0.785

27.2%

31.2%

1.33 (0.71, 2.48)

0.379

Obese

14.3%

15.7%

1.22 (0.76, 1.96)

0.400

14.4%

17.6%

1.38 (0.64, 2.97)

0.412

Females

Ow/Ob

31.9%

27.7%

0.77 (0.49, 1.21)

0.251

29.2%

28.1%

0.92 (0.44, 1.96)

0.817

Obese

12.7%

13.1%

1.08 (0.59, 19.7)

0.792

12.5%

10.4%

0.75 (0.26, 2.13)

0.583

  1. Note: Model-based Est (Estimates) and OR (odds-ratio) were adjusted for age and Hispanic race; SE Standard error; Ow/Ob Overweight/Obese; Bold-faced numbers and p-values indicate significant changes from pre to post-HealthCorps teaching