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Table 2 Polysomnographic sleep parameters among studied enuretic children (group I) and healthy control subjects (group II)

From: Primary monosymptomatic nocturnal enuresis: an etiological study

 

Group I

Group II

t test

Range

Mean ± SD

Range

Mean ± SD

t value

p value

Total sleep time (h)

5.2–8.7

6.8 ± 1

5.9–8.3

6.9 ± 0.7

0.233

0.816

Sleep efficiency (%)

68–94

81.2 ± 5.9

74–92

82.3 ± 4.7

0.67

0.503

Stage 1 latency (min)

9–22

15.5 ± 3.4

9–23

15.7 ± 4.2

0.17

0.86

Stage 2 latency (min)

11–24

17.7 ± 3.6

12–25

17.8 ± 4

0.12

0.90

Deep sleep latency (min)

13–26

19.5 ± 3.6

19–33

25.9 ± 3.7

6.58

< 0.0001*

REM latency (min)

64–105

84.7 ± 11.9

63–102

85.9 ± 10.4

0.34

0.73

N1% TST

2–7

4.6 ± 1.6

3–8

5.5 ± 1.4

2.26

0.027*

N2% TST

11–46

28.7 ± 11.3

43–57

52.3 ± 3.5

9.09

< 0.0001*

N3% TST

25–86

54 ± 18.4

11–27

20.1 ± 4

8.13

< 0.0001*

REM % TST

3–22

12.8 ± 6

14–28

22.1 ± 3.8

6.29

< 0.0001*

SSTI (/h)

6.8–30.8

19.5 ± 6.4

6.7–14.3

9.7 ± 2.3

6.74

< 0.0001*

AHI (/h)

0–3.2

1.4 ± 0.8

0.2–3.1

1.4 ± 0.8

0.149

0.88

PLMs index (/h)

2.8–12.6

6.7 ± 2.6

2.5–11.3

4.77 ± 0.8

3.24

0.002*

Snore index (/h)

1.7–60.3

15.2 ± 15.9

2.9–13.2

6.5 ± 2.9

2.42

0.018*

  1. AHI apnea hypopnea index, N1, N2, N3 non-rapid eye movement stages 1, 2, 3, PLMs periodic limb movements, REM rapid eye movement, SSTI sleep stage transition index, TST total sleep time
  2. *Significant