Weight status of adolescents in secondary schools in port Harcourt using Body Mass Index (BMI)

Table 3 Mean BMI (kg/m ² ) at various ages by gender

Age	Males		Females		P value
(Years)	No.	Mean ± SD	No.	Mean ± SD
10	15	17.25 ± 2.66	25	16.34 ± 2.11	0.20
11	32	16.20 ± 1.68	27	17.22 ± 3.60	0.70
12	61	17.38 ± 2.21	71	19.21 ± 3.09	0.00*
13	60	18.00 ± 2.41	71	19.84 ± 3.07	0.00*
14	80	19.06 ± 2.29	81	20.13 ± 2.93	0.01*
15	74	19.61 ± 1.99	92	20.34 ± 2.90	0.06
16	54	19.50 ± 1.78	56	21.38 ± 4.59	0.00*
17	50	20.72 ± 2.44	35	21.57 ± 3.05	0.15
18	35	20.82 ± 2.29	15	23.23 ± 3.20	0.00*
19	20	21.60 ± 2.15	6	22.85 ± 2.07	0.22
Total	481	19.01 ± 2.58	479	20.01 ± 3.50	0.00*

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