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Table 4 Slow spindle percentage in OSA according to topography and night sections

From: Topography-specific spindle frequency changes in Obstructive Sleep Apnea

  

Total

Non-OSA

Mild OSA

Mod OSA

Chi-square

df

  

(28)

(7)

(11)

(10)

  

Location

Night Section

      

Frontal

total

72.3

66.4

71.0

78.8c,f

39,623

2

 

I

72.1

68.3

71.2

76.1

6,041

2

 

II

75.6

75.2

70.8

81.3c

12,242

2

 

III

69.0

57.7

70.9c

79.2a,f

33,613

2

Central

total

47.7

32.6

45.7c

61.7c,f

192,429

2

 

I

53.1

41.4

48.6

65.7c,f

50,435

2

 

II

43.8

26.7

42.3c

55.9c,f

63,836

2

 

III

46.4

29.5

46.3c

64.1c,f

86,224

2

Parietal

total

32.6

17.9

29.9c

50.9c,f

297,793

2

 

I

38.9

23.2

34.7c

57.4c,f

101,732

2

 

II

27.0

17.4

22.8

41.9c,f

71,609

2

 

III

32.4

13.3

32.7c

54.1c,f

133,466

2

  1. Mod, moderate; df, degrees of freedom; Location, scalp EEG topography; total, (I+II+III) sample; I, II and III, initial, middle and final night sections, respectively. P-value significance as follows: <0.05, <0.01, <0.001. Significance of post-hoc inter-group comparisons (with Bonferroni correction for multiple comparisons) as follows: a<0.05, b<0.01, c<0.001 for contiguous comparisons; d<0.05, e<0.01, f<0.001 for non-contiguous comparisons.