. Author manuscript; available in PMC: 2016 Apr 1.

Published in final edited form as: Hippocampus. 2015 Jan 20;25(4):534–543. doi: 10.1002/hipo.22390

Table 1.

Study Variable Means (SD) and Correlations

Variables	Means (SD)	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16
1.Age	42.85 (7.34)	1
2.Gender	-	0.14^**	1
3.Race	-	0.11^*	0.07	1
4.Education	16.93 (2.85)	−0.08	−0.12^*	−0.13^*	1
5. BMI	26.92 (5.20)	0.13^**	−0.07	0.17^**	−0.23^**	1
6.Systolic Blood Pressure (mm Hg)	115.02 (11.24)	0.13^**	−0.19^**	0.22^**	−0.13^**	0.32^**	1
7.Disastolic Blood Pressure (mm Hg)	72.14 (8.07)	0.15^**	−0.09	0.14^**	−0.11^*	0.53^**	0.68^**	1
8. BDI	4.41 (4.42)	0.00	0.06	0.01	−0.19^*	−0.12^*	0.03	0.05	1
9. CES-D	8.40 (7.49)	−0.03	−.03	0.02	−0.09	0.04	−0.01	−0.02	0.69^**	1
10. Sleep Time (Hours)	6.78 (1.96)	0.01	0.08	0.02	−0.02	0.06	−0.03	−0.03	−0.12^*	−0.06	1
11. Physical Activity (Kilocalores)	2990.90 (2523.18)	−0.07	−0.17^*	−0.06	0.04	−0.07	−0.06	−0.11	−0.18^**	−0.16^**	−0.02	1
12.Photoperiod	12.51 (2.01)	−0.06	−0.06	−0.08	0.01	0.07	0.04	0.01	−0.12^*	−0.12^*	−0.03	0.05	1
13.ICV	1339910.66 (260663.49)	−0.05	−0.72^**	−0.16^**	0.09	0.08	0.14^**	0.03	−0.07	0.01	−0.09	0.16^*	0.01	1
14. Total Hippocampal Volume (mm³)	8340.47 (936.53)	−0.16^**	−0.49^**	−0.22^**	0.07	−0.02	0.08	−0.03	−0.09	−0.06	0.01	0.12^*	0.11^*	0.60^**	1
15. Left hippocampal Volume (mm³)	4134.07 (511.36)	−0.12^*	−0.46^**	−0.20^**	0.08	−0.05	0.08	−0.03	−0.08	−0.03	0.01	0.12^*	0.12^*	0.56^**	0.95^**	1
16. Right Hippocampal Volume (mm³)	4206.40 (483.18)	−0.18^**	−0.45^**	−0.21^**	0.05	−0.01	0.08	−0.03	−0.08	−0.07	0.00	0.11^*	0.09	0.57^**	0.94^**	0.77^**	1

Note: BMI= Body mass index: BDI = Beck Depression Inventory, CES-D = Center of Epidemiological Studies Depression Scale : ICV=Intracranial volume.

p < 0.05,

^**

p < 0.01