Table 2 Descriptive characteristics of parents and children of families participated in the second-stage screening by region

41.1 (5.56)

42.4 (5.32)^a,b

39.6 (5.40)^a

40.1 (5.60)^b

< 0.001

1875 (65.8)

837 (60.4)^a,b

464 (74.4)^a

574 (68.3)^b

< 0.001

1875 (65.8)

885 (63.9)^a

445 (71.3)^a,b

545 (64.8)^b

< 0.001

335 (11.7)

154 (11.1)^a,b

41 (6.5)^b,c

140 (16.7)^a,c

345 (12.1)

203 (14.7)^a

83 (13.3)^b

59 (7.0)^a,b

139 (4.9)

112 (8.1)^a,b

8 (1.3)^a

19 (2.3)^b

31 (1.1)

4 (0.3)^a,b

8 (1.3)^a

19 (2.3)^b

124 (4.4)

27 (1.9)^a,b

39 (6.3)^a

58 (6.9)^b

673 (23.6)

373 (26.9)^a

160 (25.6)^b

140 (16.7)^a,b

< 0.001

2176 (76.4)

1012 (73.1)^a

464 (74.4)^b

700 (83.3)^a,b

1006 (35.3)

506 (36.5)^a

185 (29.6)^a,b

315 (37.5)^b

< 0.001

1045 (36.7)

550 (39.7)^a

203 (32.6)^a

292 (34.8)

8.16 (1.02)

7.80 (0.93)^a,b

8.43 (1.00)^a

8.36 (1.00)^b

< 0.001

1385 (51.1)

549 (50.4)

393 (52.2)

443 (51.0)

0.752