School-Based Obesity Prevention Intervention in Chilean Children: Effective in Controlling, but not Reducing Obesity

Table 2

Comparison of BMI 𝑍 score and prevalence of obesity by school (2011-2012).

	Sample Size	BMI 𝑍			% obesity
		August; 2011	November 2012	P	August; 2011	November 2012	P
Intervention schools
Brigida	56	0.77 (1.7)	0.91 (1.33)	0.326	23.2	23.1	0.99
B. Claro	114	1.45 (1.1)	1.27 (1.1)	0.0002	28.1	25.4	0.83
E. Frei	249	1.14 (1.1)	1.12 (1.1)	0.7	22.1	22.6	0.43
C. Rica	170	1.14 (1.14)	1.13 (1.14)	0.814	24.0	25.1	0.95
R. Francia	58	1.4 (1.4)	1.31 (1.37)	0.264	26.3	25.4	0.82
Control schools
G. Zañartu	112	1.22 (1.2)	1.34 (1.2)	0.08	21.4	25.4	0.27
J. Toribio	176	1.11 (1.2)	1.39 (1.1)	0.0001	22.2	29.4^1	0.0003
Lenka	117	1.11 (1.3)	1.26 (1.3)	0.0035	26.5	29.9	0.46
Siria	416	0.99 (1.1)	1.1 (1.1)	<0.001	16.8	18.5	0.32