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Observational Study
Copyright: ©Author(s) 2026.
World J Clin Pediatr. Dec 9, 2026; 15(4): 122376
Published online Dec 9, 2026. doi: 10.5409/wjcp.122376
Table 4 Mean age (years) of attainment of breast development stage in Kawasaki disease girls and genitalia stage in Kawasaki disease boys

n (%)
χ2 (P value)KD
Control
Mann-Whitney U
KD
Control
mean ± SD
Median (interquartile rage)
mean ± SD
Median (interquartile rage)
Z (P value)
Breast stage
B15 (33.3)2 (10.5)4.36 (0.35)8.6 ± 0.548.83 (8.00-9.04)8.2 ± 0.948.25 (5.68-10.97)0.78 (0.43)
B21 (6.7)5 (26.3)10.0 ± 0.009.2 ± 0.849.0 (8.50-10.00)0.94 (0.34)
B34 (26.7)7 (36.8)12.4 ± 1.9012.50 (10.52-14.16)12.5 ± 1.4812.00 (1.33-14.00)0.18 (0.85)
B42 (50)2 (10.5)13.7 ± 0.3511.75 (8.62-12.02)13.3 ± 0.7612.29 (8.81-12.45)0.77 (0.44)
B53 (20)3 (15.8)16.3 ± 2.2017.16 (13.83-18.00)17.3 ± 0.6317.00 (16.83-18.00)0.00 (1.00)
Genitalia stage
G18 (25)7 (20)7.80 (0.09)9.38 ± 1.299.12 (8.12-10.81)9.63 ± 1.639.00 (8.41-11.66)0.46 (0.64)
G29 (28.1)17 (48.6)9.42 ± 0.919.00 (8.62-10.16)10.77 ± 1.3510.91 (10.00-11.87)2.35 (0.02a)
G30 (0)3 (8.6)11.25 ± 2.8112.75 (8.00-13.00)
G44 (12.5)3 (8.6)13.81 ± 1.2413.87 (12.62-14.93)14.83 ± 1.6015.50 (13.00-16.00)1.24 (0.21)
G511 (34.4)5 (14.3)15.16 ± 1.6815.08 (13.33-16.00)16.10 ± 1.8716.00 (14.25-18.00)1.13 (0.25)


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