Table 3

Adjusted odds ratios and 95% confidence intervals for abnormalities in SAQ factors using logistic regression models with forward selection

Variable*

Sleep Apnea

Restlessness

Non-restorative

Insomnia

Excessive Daytime Sleepiness


Fatigue group

NF

1.0

1.0

1.0

1.0

1.0

NF|F

3.50 (0.93,13.16)

11.13(2.86,43.26)

1.0

1.0

2.13(0.62,7.32)

ISF

3.50 (1.22,10.01)

7.91(2.57,24.34)

5.37 (1.73,16.67)

6.25(1.78,21.96)

4.80(1.89,12.21)

M/P

2.83 (1.02,7.83)

14.19(4.73,42.55)

21.50(7.30,63.38)

12.73(3.80,42.63)

5.26(2.14,12.94)

CFS-R

2.74 (0.67,11.18)

5.23(1.27,21.57)

13.63 (3.33,55.81)

8.05 (1.69,38.34)

3.48(0.99,12.25)

CFS

2.06 (0.52,8.23)

16.02(4.17,61.55)

28.10 (7.38,106.99)

9.66 (2.30,40.69)

2.41(0.74,7.82)

Female

---

---

---

---

---

Age (years)

---

---

1.05 (1.02,1.07)

---

---

BMI

---

---

---

<18.5

1.76(0.45,6.84)

2.57(0.70,9.35)

18.5–24.9

1.0

1.0

25–29.9

1.44(0.78,2.68)

1.60(0.86,2.98)

≥ 30

2.18(1.21,3.91)

2.26(1.27,4.04)

Neck circumference (cm)

1.13 (1.05,1.20)

---

---

---

---

Goodness-of-fit P

0.9244

0.7933

0.0701

1.0000

0.6676


*Fatigue groups were included in all models; other variables entered the models using a forward selection method Hosmer-Lemeshow statistic ---: variable did not satisfy forward selection algorithm NF and NF|F reference for non-restorative sleep and insomnia; NF reference for all other SAQ Factors NF – never fatigued; NF|F – baseline fatigue currently not fatigued; ISF – insufficient symptoms or fatigue for CFS; M/P – medical or psychiatric exclusion; CFS-R – baseline CFS currently remission; CFS – currently CFS

Unger et al. BMC Neurology 2004 4:6   doi:10.1186/1471-2377-4-6

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