Table 4

Demographic and psychological correlates of sleep quality among university students
Characteristics Model-I (N = 2511) Adj. OR (95% CI) Model-II (N = 2551) Adj. OR (95% CI) Model-III (N = 2511) Adj. OR (95% CI)
Sex Male 1 1
Female 1.14 (0.94, 1.38) 1.23 (1.00, 1.57)*
Year of Study 2nd year 2.97 (2.18, 4.04)** 2.91 (2.1, 4.02)**
3rd year 2.14 (1.57, 2.92)** 2.25 (1.62, 3.12)**
≥4th year 1 1
University Haramaya 1 1
Gondar 1.22 (1.04,1.44)* 1.36 (1.13, 1.63)*
Perceived stress 1st quartile 1 1
2nd quartile 1.42 (1.13, 1.77)* 1.35 (1.10, 1.70)*
3rd quartile 1.66 (1.32, 2.08)** 1.55 (1.23, 1.96)**
4th quartile 2.11 (1.64, 2.72)** 1.90 (1.46, 2.46)**
Depression Normal 1 1
Mild 1.26 (0.99, 1.61) 1.36 (1.06, 1.75)*
Moderate 1.48 (1.16, 1.90)* 1.64 (1.27, 2.11)**
Severe 1.62 (1.11, 2.37)* 1.64 (1.11, 2.42)*
Extremely severe 2.38 (1.42, 4.00)* 2.65 (1.56, 4.49)**
Anxiety Normal 1 1
Mild 1.33 (1.00, 1.77)* 1.26 (0.94, 1.70)
Moderate 1.31 (1.04, 1.66)* 1.27 (1.00, 1.61)*
Severe 1.82 (1.32, 2.49)** 1.62 (1.17, 2.24)*
Extremely severe 1.94 (1.41, 2.67)** 1.76 (1.27, 2.45)*

*p-value <0.05, **p-value < 0.01.

N.B. The third model is controlled for coffee, khat, alcohol, and cigarette consumption. Age was excluded from the model as it has strong correlation with year of study in University.

Lemma et al.

Lemma et al. BMC Psychiatry 2012 12:237   doi:10.1186/1471-244X-12-237

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