. Author manuscript; available in PMC: 2014 Mar 1.

Published in final edited form as: Psychol Aging. 2012 Oct 22;28(1):47–56. doi: 10.1037/a0029983

Table 2.

Age, NA and Bedtime Cortisol

Fixed Effects	Model 1	Model 2	Model 3	Model 4

	Estimate (SE)	Estimate(SE)	Estimate(SE)	Estimate (SE)
Intercept	−1.163 (.374)^**	−1.147 (.374)^**	−1.141 (.374)^**	−1.118 (.374)^**
Sample Time (WP)	.096 (.164)^***	.095 (.016)^***	.095 (.016)^***	.094 (.016)^***
Sample Time (BP)	−.082 (.025)^***	−.082 (.025)^***	−.082 (.025)^***	−.081 (.025)^***
Day	.003 (.009)	.003 (.009)	.004 (.009)	.004 (.009)
Age	.017 (.002)^***	.018 (.002)^***	.018 (.002)^***	.018 (.002)^***
Sex (1 = Male)	−.049 (.044)	−.050 (.044)	−.051 (.044)	−.051 (.044)
Race (1 = White)	.355 (.064)^***	.354 (.064)^***	.354 (.064)^***	.354 (.064)^***
Education	−.013 (.019)	−.015 (.019)	−.015 (.018)	−.015 (.019)
Chronic illnesses	.006 (.012)	.005 (.012)	.005 (.012)	.005 (.012)
Smoking status (1 = Yes)	−.337 (.070)^***	−.342 (.070)^***	−.342 (.070)^***	−.342 (.070)^***
Medication Use (1 = Yes)	.025 (.046)	.025 (.046)	.025 (.046)	.025 (.046)
Negative Affect (WP)	.135 (.060)^*	.149 (.061)^*	.165 (.073)^*	.175 (.072)^*
Negative Affect (BP)	.345 (.102)^***	.399 (.105)^***	.398 (.105)^***	.386 (.105)^***
Age x Negative Affect (WP)		.007 (.005)	.006 (.005)	.012 (.006)^*
Age x Negative Affect (BP)		.017 (.008)^*	.017 (.008)^*	.016 (.008)
NA (WP) x NA (BP)			−.072 (.185)	.012 (.006)
Age x NA (WP) x NA (BP)				−.035 (.017)^*
Random Effects
Intercept	.491 (.025)^***	.489 (.025)^***	.489 (.025)^***	.489 (.025)^***
Negative Affect (WP)	.128 (.084)	.135 (.085)	.132 (.085)	.104 (.081)
Covariance	−.014 (.049)	−.009 (.049)	−.011 (.049)	−.021 (.048)
Residual	.519 (.013)^***	.518 (.013)^***	.519 (.013)^***	.519 (.013)^***
Model Fit
−2 Log Likelihood	13338.1	13250.6	13250.5	13246.4

Note:

p<.05,

^**

p<.01,

^***

p<.001.

WP = Within-Person, BP = Between-Person