Table 4.

Hierarchical Linear Regression Analyses examining the association between IIP subscales and the interaction of group status*IIP subscales.

IIP Subscale	Sleep Outcome	IIP subscale	Group*IIP subscale
		β (t)	β (t)
	Cognitive Presleep Arousal
Interpersonal Sensitivity		0.12 (1.16)	0.10 (0.99)
Need for Social Approval		0.13 (1.22)	0.18 (1.82)
Ambivalence		−0.06 (−0.56)	−0.11 (−1.07)
Aggression		0.17 (1.55)	0.13 (1.26)
Lack of Sociability		0.14 (1.42)	0.24 (2.48)**
	Insomnia Severity
Interpersonal Sensitivity		0.111 (2.57)**	0.12 (2.95)**
Need for Social Approval		0.04 (0.93)	0.05 (1.05)
Ambivalence		0.04 (0.89)	0.06 (1.40)
Aggression		0.05 (1.05)	0.05 (1.11)
Lack of Sociability		0.08 (1.84)	0.09 (2.09)*
	Hyperarousal
Interpersonal Sensitivity		0.59 (5.87)***	−0.01 (−1.13)
Need for Social Approval		0.44 (4.65)***	−0.12 (−1.27)
Ambivalence		0.19 (1.84)	−0.15 (−1.47)
Aggression		0.163 (1.42)	−0.16 (−1.46)
Lack of Sociability		0.32 (3.32)**	−0.15 (−1.56)
	Sleep Latency
Interpersonal Sensitivity		−0.22 (−1.59)	−0.35 (−2.70)*
Need for Social Approval		−0.21 (−1.53)	−0.21 (−1.45)
Ambivalence		−0.03 (−0.23)	−0.07 (−0.52)
Aggression		−0.19 (−1.27)	−0.35 (−2.62)*
Lack of Sociability		0.05 (0.39)	−0.06 (−0.44)*
	Percent REM
Interpersonal Sensitivity		0.32 (2.35)*	0.12 (0.88)
Need for Social Approval		0.24 (1.68)	0.03 (0.22)
Ambivalence		0.04 (0.26)	0.08 (0.59)
Aggression		0.03 (0.20)	0.14 (0.92)
Lack of Sociability		0.22 (1.57)	0.02 (0.14)

Note. Subscale are entered in separate models. All models include age, gender, marital status, and group as covariates.

^*p < .05;

^**p < .01;

^***p < .001