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. 2020 Sep 18;11:561564. doi: 10.3389/fpsyt.2020.561564

Table 2.

Insomnia and sleep duration as predictors of suicidal ideation in the replication sample (NHANES 2005–2006 cycle): Odds ratios from ordered logistic regression.

Model 1 Model 2 Model 3
OR 95% CI OR 95% CI OR 95% CI
Global insomnia 1.11** 1.04–1.19 1.09* 1.00–1.19
Sleep duration (h)
 <= 4 3.85* 1.42–1.40 2.83* 1.10–7.32
 5 2.93* 1.14–7.50 2.41 0.96–6.09
 6 1.50 0.71–3.17 1.37 0.65–2.90
 7
 8 1.45 0.56–3.73 1.56 0.60–4.09
 9 2.78 0.68–11.33 2.88 0.66–12.51
 >= 10 3.14 0.36–27.03 3.33 0.38–29.30
Age 1.01 1.00–1.03 1.01 1.00–1.03 1.01 0.99–1.03
Female 0.91 0.45–1.84 1.03 0.51–2.10 0.94 0.47–1.87
Race-ethnicity
 Non-Hispanic White
 Non-Hispanic Black 1.23 0.69–2.20 1.11 0.62–1.98 1.18 0.67–2.07
 Mexican American 1.76 0.89–3.49 1.69 0.89–3.24 1.85 0.96–3.56
 Other 3.42* 1.29–9.08 3.70* 1.44–9.49 3.70* 1.44–9.52
Educational attainment
 Less than 9th grade
 9th through 11th 1.06 0.40–2.78 1.09 0.45–2.67 1.06 0.43–2.62
 High school diploma 0.91 0.41–2.00 0.91 0.41–2.04 0.90 0.40–2.03
 Some college 0.98 0.42–2.28 0.97 0.42–2.20 0.97 0.43–2.22
 College graduate 0.72 0.25–2.11 0.76 0.26–2.24 0.74 0.25–2.21
Poverty-to-income 0.79* 0.67–0.95 0.80* 0.66–0.97 0.81* 0.67–0.98
Marital status
 Married
 Widowed 0.87 0.25–2.97 0.83 0.23–3.03 0.83 0.22–3.12
 Divorced 1.60 0.81–3.15 1.61 0.82–3.15 1.63 0.84–3.19
 Separated 0.87 0.32–2.32 0.82 0.31–2.19 0.81 0.30–2.21
 Never married 2.01 0.96–4.20 1.92 0.92–4.00 1.94 0.93–4.03
 Cohabiting 1.48 0.55–3.97 1.38 0.49–3.83 1.43 0.53–3.83
Smoking status
 Non-smoker
 Ex-smoker .50 0.24–1.03 0.56 0.28–1.12 0.53 0.26–1.08
 Current smoker .70 0.40–1.23 0.75 0.44–1.27 0.72 0.42–1.23
Alcoholic drinks/week 1.01 0.98–1.04 1.01 0.99–1.04 1.01 0.98–1.03
Alcoholic binges/week 1.07 0.85–1.35 1.07 0.84–1.35 1.08 0.86–1.36
Depression 55.49*** 21.82–141.11 63.35*** 27.72–144.79 52.57*** 22.05–125.32

N = 4,773. *p < 0.05, **p < 0.01, ***p < 0.001.