Table 1.

Demographic and Clinical Characteristics of Children Undergoing Echocardiographic Screening in Public Schools, Primary Care Centers, and Private Schools

Variable	Public Schools (n=10 901)	Primary Care Centers (n=558)	Private Schools (n=589)	P Value	Pairwise Comparisons
Age, median (quartile 1–3)	12.8 (10.8–15.0)	13.7 (11.8–16.0)	15.7 (14.3–16.5)	<0.001	P<0.001a P<0.001b P<0.001c
Age >12 y, N (%)	6510 (60.2)	397 (71.1)	544 (93.6)	<0.001	P<0.001a P<0.001b P<0.001c
Male sex, N (%)	4845 (44.8)	267 (47.9)	224 (38.1)	0.002	P=0.16a P=0.001b P=0.001c
No. of inhabitants, median (quartile 1–3)	4.0 (4.0–5.0)	4.0 (4.0–5.0)	4.0 (3.0–4.0)	<0.001	P=0.65a P<0.001b P<0.001c
No. of inhabitants <15 y, median (quartile 1–3)	2.0 (1.0–2.0)	1.0 (1.0–2.0)	1.0 (0–2.0)	<0.001	P<0.001a P<0.001b P<0.001c
HDI, median (quartile 1–3)	0.770 (0.762–0.801)	0.770 (0.770–0.770)	0.955 (0.955–0.955)	<0.001	P=0.38a P<0.001b P<0.001c

HDI indicates Human Development Index; and quartile 1–3, 25%–75%.

^aPublic schools vs primary care.

^bPublic schools vs private schools.

^cPrimary care vs private schools.