this study on pre-schoolers N = 44 (%)

health survey on pre-schoolers N = 931 (%)

z

p

before 7 am

14 (31.8)

232 (24.9)

1.030

0.303

7 - 8 am

25 (56.8)

580 (62.3)

−0.732

0.464

after 8 am

5 (11.4)

102 (11.0)

0.085

0.933

N.A.

0 (0.0)

17 (1.8)

−0.898

0.369