Table 3.

MMPI-2 scores of study subgroups based on objective sleep duration

	1. Control ≥ 6 h (n = 359)	2. Insomnia ≥ 6 h (n = 60)	3. Control < 6 h (n = 365)	4. Insomnia < 6 h (n = 82)	Interactiona	Insomniaa	Objective sleep durationa	post-hocb
Composite scores
Total score	50.00 (0.35)	54.34 (0.86)	50.74 (0.35)	53.92 (0.71)	.86	<.001	.48	1 < 2; 3 < 4
Number of elevations	0.78 (0.08)	1.64 (0.19)	0.85 (0.08)	1.38 (0.16)	.68	<.001	.98	1 < 2; 3 < 4
Clinical scales
1-Hypochondriasis	54.13 (0.60)	60.35 (1.48)	55.47 (0.60)	62.24 (1.23)	.78	<.001	.11	1 < 2; 3 < 4
2-Depression	50.49 (0.62)	58.60 (1.53)	51.79 (0.62)	57.05 (1.27)	.59	<.001	.97	1 < 2; 3 < 4
3-Hysteria	52.28 (0.62)	54.91 (1.53)	53.46 (0.62)	57.78 (1.27)	.81	<.001	.13	1 < 2; 3 < 4
4-Psychopathic Deviate	49.15 (0.54)	54.05 (1.35)	51.03 (0.54)	52.62 (1.12)	.55	.001	.75	1 < 2
6-Paranoia	49.04 (0.57)	52.96 (1.41)	49.62 (0.57)	51.63 (1.17)	.65	.003	.90	1 < 2
7-Psychasthenia	49.12 (0.55)	54.55 (1.37)	50.19 (0.55)	51.78 (1.14)	.03	<.001	.83	1 < 2
8-Schizophrenia	47.94 (0.55)	51.53 (1.37)	48.66 (0.55)	50.76 (1.14)	.79	.01	.66	---
9-Hypomania	48.14 (0.54)	48.51 (1.33)	47.24 (0.54)	50.03 (1.11)	.07	.114	.46	---
0-Social Introversion	49.68 (0.54)	53.58 (1.35)	49.24 (0.54)	51.35 (1.12)	.30	.003	.40	1 < 2
Research scales
Depression	48.16 (0.57)	53.84 (1.40)	47.99 (0.61)	52.64 (1.32)	.17	<.001	.87	1 < 2; 3 < 4
Anxiety	48.25 (0.55)	53.80 (1.35)	48.50 (0.59)	49.41 (1.28)	. 046	.01	.78	1 < 2; 2 > 4
Ego Strength	48.68 (0.58)	44.38 (1.42)	47.61 (0.62)	47.80 (1.34)	.01	.001	.92	1 < 2; 2< 4

Data are in mean (SEM).

^aP values from 2 by 2 MANCOVA F test;

^bp < .05, post-hoc Bonferroni test while adjusting for age, race, sex, education, BMI, SDB, physical health, and mental health.