Table 4 Comparison of sleep habits between the case and control groups

Children

Bedtime at night (24 h)

9.76 ± 0.61

9.87 ± 0.82

-1.14

0.26

Sleep hours per day (24 h)

9.13 ± 0.93

9.26 ± 0.89

-1.19

0.24

Day sleep (24 h)

0.37 ± 0.60

0.33 ± 0.64

0.52

0.61

Night sleep (24 h)

8.77 ± 0.77

8.94 ± 0.71

-1.92

0.06

Wake-up at night (%)

0.00*

Once

33 (33.00)

55 (27.50)

2 times

6 (6.00)

0 (0.00)

≥ 3 times

2 (2.00)

3 (1.50)

Not at all

59 (59.00)

142 (71.00)

Time to put a child to sleep at night (%)

0.98*

0–10 min

26 (26.00)

60 (30.00)

10–20 min

37 (37.00)

69 (34.50)

20–30 min

25 (25.00)

45 (22.50)

30–40 min

6 (6.00)

13 (6.50)

40–60 min

4 (4.00)

9 (4.50)

> 60 min

2 (2.00)

4 (2.00)

Child snore (%)

0.09*

Never

39 (39.00)

61 (30.50)

Only on cold or allergy

20 (20.00)

57 (28.50)

Sometimes

37 (37.00)

80 (40.00)

Always

4 (4.00)

2 (1.00)