Table 3.

Median values, ranges, mean values and standard deviation of BMI in all examined groups

Age	All
	Number	Med.	Ranges	Mean	SD
Boys	748	17.87	13.1–38.2	18.62	3.29
6	33	16.46	14.4–19.7	16.51	1.34
7	94	16.59	13.2–24.4	17.16	2.22
8	108	17.46	13.1–26.4	17.65	2.37
9	116	17.34	13.3–27.0	18.11	2.69
10	103	17.87	13.7–34.7	19.18	3.60
11	108	18.56	13.8–34.3	19.13	3.47
12	137	19.49	14.2–38.2	20.13	3.80
13	49	19.28	13.8–30.8	19.87	3.52
Girls	747	17.39	11.9–32.0	17.86	2.92
6	35	16.05	13.4–28.4	16.80	2.70
7	83	16.00	11.9–23.3	16.37	2.36
8	119	16.18	13.4–27.3	16.75	2.28
9	97	17.14	13.4–25.5	17.53	2.55
10	113	17.42	13.4–28.8	17.77	2.62
11	134	17.84	13.6–26.8	18.30	3.21
12	118	19.05	14.5–32.0	19.43	2.85
13	48	19.21	15.3–27.8	19.86	3.12

Med. median values, SD standard deviation