Prevalence of Functional Constipation and Relationship with Dietary Habits in 3- to 8-Year-Old Children in Japan

Table 2

Characteristics of the subjects.

		FC	Non-FC	value
				t-test	ANCOVA
Boys : girls		367 : 351	1439 : 1438	0.617
Mean age (years)	All	6.5 ± 1.3	6.4 ± 1.3	0.112
	Boys	6.4 ± 1.4	6.4 ± 1.3	0.912
	Girls	6.6 ± 1.3	6.5 ± 1.3	0.015
Mean height (cm)	All	118.6 ± 10.0	118.5 ± 9.3	0.387	0.479
	Boys	118.6 ± 10.0	118.5 ± 9.3	0.863	0.362
	Girls	118.3 ± 8.8	117.7 ± 8.8	0.287	0.315
Mean weight (kg)	All	22.2 ± 4.9	21.8 ± 4.5	0.047	0.218
	Boys	22.5 ± 5.4	22.2 ± 4.6	0.149	0.133
	Girls	21.9 ± 4.3	21.6 ± 4.4	0.238	0.467
Mean BMI (kg/m^2)	All	15.7 ± 1.9	15.5 ± 1.9	0.049	0.067
	Boys	15.8 ± 2.1	15.6 ± 1.9	0.033	0.193
	Girls	15.5 ± 1.8	15.5 ± 1.9	0.554	0.588
Mean height z-score	All	−0.15 ± 1.14	−0.08 ± 1.06	0.148	0.171
	Boys	−0.07 ± 1.16	−0.04 ± 1.09	0.722	0.296
	Girls	−0.22 ± 1.12	−0.11 ± 1.02	0.078	0.454
Mean weight z-score	All	−0.22 ± 1.03	−0.22 ± 0.99	0.911	0.806
	Boys	−0.15 ± 1.16	−0.26 ± 1.22	0.122	0.384
	Girls	−0.29 ± 1.01	−0.25 ± 0.96	0.592	0.544
Mean BMI percentile	All	45.47 ± 28.67	43.23 ± 28.11	0.057	0.042
	Boys	46.81 ± 29.42	43.91 ± 28.67	0.085	0.338
	Girls	44.06 ± 27.84	42.54 ± 27.53	0.355	0.290

Data are shown as the mean ± standard deviation. ANCOVA: analysis with age as a covariate (Bonferroni).