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. Author manuscript; available in PMC: 2013 Jan 1.
Published in final edited form as: Biol Psychol. 2011 Sep 17;89(1):34–38. doi: 10.1016/j.biopsycho.2011.09.002

Figure 2.

Figure 2

Perceived discrimination significantly mediated ethnic differences in Stage 2 Sleep and SWS (covariates age, BMI, SES and smoking were controlled for in the model). Path values are unstandardized regression coefficients with SE in parentheses. The point estimates represent the mediated (indirect) effects derived from the bootstrapped product of paths a and b. (A) Ethnicity significantly predicted time slept in Stage 2 sleep. (B) Perceived discrimination was a partial mediator of the effects of ethnicity on Stage 2 sleep (point estimate = 0.0055; BCa = 0.0002 – 0.0131). (C) Ethnicity significantly predicted time slept in SWS. (D). Perceived discrimination was a partial mediator of the effects of ethnicity on SWS (point estimate = −0.0071; BCa = −.0146 – −.0018).

*p < .05, ** p < .01, ***p < .001.