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. Author manuscript; available in PMC: 2013 Jul 1.
Published in final edited form as: J Psychiatr Res. 2012 May 1;46(7):953–959. doi: 10.1016/j.jpsychires.2012.04.008

Table 2.

The longitudinal relationship between sleep problems and suicidality in the National Longitudinal Study of Adolescent Health.

Thoughts Attempts
Wald χ2 Odds ratio 95% CI Wald χ2 Odds ratio 95% CI
Wave 2
Gender 39.85 2.03*** 1.63–2.53 27.28 2.69*** 1.86–3.90
Age 1.33 1.09 .94–1.26 1.17 1.13 .90–1.43
Race-ethnicity 2.91 1.23 .97–1.57 .19 .92 .64–1.33
Education 7.89 .80* .68–.93 9.32 .68** .53–.87
Poverty status .61 .88 .63–1.22 1.94 .66 .37–1.18
Chronic health conditions 2.25 1.17 .95–1.45 .90 1.17 .84–1.63
Alcohol problems (previous wave) 11.92 1.62*** 1.23–2.13 12.74 2.07*** 1.39–3.09
Drug use (previous wave) 33.19 1.98*** 1.57–2.50 23.06 2.44*** 1.70–3.51
Depression (previous wave) 34.26 1.06*** 1.04–1.09 29.12 1.08*** 1.05–1.12
Sleep problems (previous wave) 14.57 1.20*** 1.09–1.32 7.79 1.22** 1.06–1.41
Wave 3
Gender 2.23 .80 .60–1.07 1.97 1.55 .84–2.87
Age 2.59 .84 .69–1.04 .24 .90 .60–1.36
Race-ethnicity 4.23 1.43* 1.02–2.0 1.73 .67 .37–1.22
Education .36 .93 .75–1.17 .76 .82 .52–1.28
Poverty status .10 .93 .60–1.45 .04 1.07 .52–2.20
Chronic health conditions 2.55 1.27 .95–1.69 .20 1.14 .64–2.02
Alcohol problems (previous wave) .05 .95 .63–1.44 .44 .73 .29–1.84
Drug use (previous wave) 3.11 1.35 .97–1.88 1.12 1.43 .74–2.78
Depression (previous wave) 18.59 1.07*** 1.04–1.10 2.09 1.04 .99–1.11
Sleep problems (previous wave) 7.77 1.23** 1.06–1.43 .04 1.03 .76–1.40
*

Note. p < .05,

**

p < .01,

***

p < .001.