Table 4

Multivariable logistic regression models for predicting the odds of using sleep aids, either inclusive or exclusive of alcohol.

Sleep aids inclusive of alcohol

Sleep aids exclusive of alcohol

Odds Ratio

95% confidence interval

Odds Ratio

95% confidence interval

Type of program

PGY1–4 v PGY1–3

2.09

(1.17 – 3.72)

1.82

(1.03 – 3.22)

PGY2–4 v PGY1–3

1.43

(0.81 – 2.53)

1.31

(0.75 – 2.30)

Causes of fatigue

Work-related emotional stress

2.03

(1.35 – 3.04)

1.74

(1.15 – 2.64)

Family commitments

1.41

(0.94 – 2.11)

Causes of difficulty initiating sleep

Family commitments

1.76

(1.13 – 2.73)

Changing circadian rhythms

2.05

(1.33 – 3.16)

1.99

(1.28 – 3.08)

Age

0.95

(0.89 – 1.00)

Handel et al. BMC Health Services Research 2006 6:136   doi:10.1186/1472-6963-6-136