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. Author manuscript; available in PMC: 2009 Jun 24.
Published in final edited form as: JAMA. 2008 Dec 24;300(24):2859–2866. doi: 10.1001/jama.2008.867

Figure 2. Coronary calcification incidence by mean sleep duration.

Figure 2

Confidence intervals are 95% binomial intervals; test for trends is logistic regression of incidence on group value (ie, lowest category = 3; highest category = 8). For continuous adjusted analysis see Table 3. Three self-reports were missing.