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. Author manuscript; available in PMC: 2010 Sep 1.

Published in final edited form as: Int J Geriatr Psychiatry. 2009 Sep;24(9):1010–1019. doi: 10.1002/gps.2213

Table 2.

Intercorrelations between predictor variables and outcome variables

Predictor variables	Neuropsychological tests

	Trail making A	Trail making B	SDMT	Digit span backward	COWA
Non-depressed
1. Age	0.28^*	0.39**	−0.42^*	−0.03	−0.11
2. Sex	−0.05	0.05	0.08	0.10	0.18
3. Education	−0.20	−0.18	0.33^*	0.06	0.26^*
4. Race	0.27^*	0.37^*	−0.48^*	−0.32^*	−0.27^*
5. Neuroticism	−0.09	0.09	−0.06	−0.05	−0.06
6. Extraversion	0.03	−0.02	−0.07	−0.14	−0.03
7. Openness	−0.05	−0.08	0.15	0.08	0.13
8. Agreeableness	−0.26^*	−0.05	−0.02	−0.19	−0.10
Depressed
1. Age	0.25^*	0.30^*	−0.38^*	−0.06	0.01
2.Sex	0.17	0.10	−0.05	0.08	−0.04
3. Education	−0.44^*	−0.50^*	0.50^*	0.38^*	0.52^*
4. Race	0.18	0.06	−0.13	−0.14	−0.15
5. Neuroticism	−0.04	0.18	−0.08	0.13	0.06
6. Extraversion	−0.10	−0.12	0.12	0.08	0.12
7. Openness	−0.34^*	−0.51^*	0.45^*	0.46^*	0.47^*
8. Agreeableness	−0.04	0.02	0.01	−0.01	−0.11

COWA = Controlled Oral Word Association Test; SDMT = Symbol Digit Modalities Test.

^*

p<0.01.