Table IV.

Hierarchical Regressions With Biopsychosocial Variables and Multiple Pain Features

Variable	B	95% CI	β	ΔR2	Total R2
Pain frequency
Child psychological				.17**	.17
Negative thinking	0.01**	0.00, 0.01	.32
Positive mood	−0.11*	−0.21, 0.00	−.21
Pain intensity
Child biological				.06*	.06
Sickle cell genotype	0.90*	0.08, 1.71	.25
Child psychological				.02	.08
Negative thinking	0.01	−0.01, 0.03	.16
Pain duration
Child psychological				.09*	.09
Negative thinking	0.02*	0.00, 0.03	.23
Positive mood	−0.31	−0.76, 0.14	−.16
Caregiver psychological				.03	.12
Passive coping	0.04	−0.02, 0.09	.17
Health care utilization
Child biological				.04	.04
Sickle cell genotype	1.69	−0.46, 3.83	.19
Child psychological				.11*	.15
Negative thinking	0.03	−0.01, 0.06	.17
Positive mood	−1.22*	−2.24, −0.19	−.27
Caregiver psychological				.10*	.25
Active coping	0.05	−0.01, 0.10	.21
Passive coping	0.10	−0.02, 0.22	.20

Note. Pain frequency was log-transformed because of several influential cases and a nonnormal residual distribution. The models for pain duration and health care utilization included a subset of 70 families with both child and caregiver data.

*p < .05; **p < .01.