Table 2

Distribution of Breathing and Movement Abnormalities During Sleep

Clinical Sleep Variable

CFS (n = 35)

NF (n = 40)

P-value*


Hypopnea

Mean event/hr

2.66

1.79

P = 0.24

Range

(0.00 – 16.03)

(0.00 – 14.66)

Obstructive Apnea

Mean event/hr

0.94

0.59

P = 0.003

Range

(0.00 – 12.11)

(0.00 – 10.70)

Central Apnea

Mean event/hr

0.36

0.15

P = 0.18

Range

(0.00 – 2.44)

(0.00 – 1.89)

Mixed Apnea

Mean event/hr

0.14

0.15

P = 0.58

Range

(0.00 – 2.28)

(0.00 – 3.15)

Snore Index

Mean

5.31

4.57

P = 0.95

Range

(0.00 – 27.50)

(0.00 – 34.30)

Respiratory Distress Index

Mean

4.11

2.69

P = 0.009

Range

(0.10 – 21.21)

(0.00 – 20.35)

Periodic Leg Movements

Mean events/hr

4.42

4.56

P = 0.35

Range

(0.00 – 25.74)

(0.00 – 39.37)

Periodic Leg Movements with Arousals

Mean events/hr

1.03

0.87

P = 0.62

Range

(0.00 – 11.57)

(0.00 = 7.09)


*P-values were generated using zero-inflated Poisson regression, adjusting for use (yes/no) of sleep medications. Mean values represent arithmetic means. Leg movement was not measured in 9 CFS cases and 1 control.

Reeves et al. BMC Neurology 2006 6:41   doi:10.1186/1471-2377-6-41

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