Table 5 Frequency of representation of G1 and G2 boys in the percentile bands of the 6th NAS growth chart
Age (years) | P1 (p < 25) | P2 (p 25-75) | P3 (p 75-90) | P4 (p 90-97) | P5 (p > 97) | |||||
|---|---|---|---|---|---|---|---|---|---|---|
G1 n (%) | G2 n (%) | G1 n (%) | G2 n (%) | G1 n (%) | G2 n (%) | G1 n (%) | G2 n (%) | G1 n (%) | G2 n (%) | |
11 | 23(22.3) | 7(6.3) | 38(36.9) | 51(45.9) | 19(18.4) | 21(18.9) | 10(9.7) | 17(15.3) | 13(12.6) | 15(13.5) |
12 | 29(33.7) | 18(27.3) | 32(37.2) | 32(48.5) | 11(12.8) | 6(9.1) | 10(11.6) | 5(7.6) | 4(4.7) | 5(7.6) |
13 | 18(14.9) | 3(5.8) | 67(55.4) | 28(53.8) | 18(14.9) | 11(21.2) | 11(9.1) | 4(7.7) | 7(5.8) | 6(11.5) |
14 | 11(8.6) | 10(16.4) | 76(59.4) | 23(37.7) | 21(16.4) | 12(19.7) | 15(11.7) | 11(18.0) | 5(3.9) | 5(8.2) |
15 | 13(10.7) | 12(19.4) | 67(55.4) | 26(41.9) | 30(24.8) | 16(25.8) | 8(6.6) | 6(9.7) | 3(2.5) | 2(3.2) |
16 | 23(17.2) | 17(15.6) | 66(49.3) | 41(37.6) | 21(15.7) | 31(28.4) | 10(7.5) | 10(9.2) | 14(10.4) | 10(9.2) |
17 | 23(16.0) | 14(11.6) | 70(48.6) | 52(43.0) | 23(16.0) | 29(24.0) | 13(9.0) | 12(9.9) | 15(10.4) | 14(11.6) |
18 | 18(11.2) | 22(24.7) | 79(49.1) | 27(30.3) | 41(25.5) | 19(21.3) | 16(9.9) | 12(13.5) | 7(4.3) | 9(10.1) |
p value | 0.04 | 5.32 × 10−7 | 0.02 | 0.44 | 0.98 | |||||