The effect of intercessory prayer on wound healing in nonhuman primates.

OBJECTIVES

This study was performed to examine the effects of intercessory prayer (IP) on wound healing and related physiological and behavioral factors in nonhuman primates.

DESIGN

Twenty-two bush babies (Otolemur garnettii) with chronic self-injurious behavior (SIB) were stratified by wound severity and matched by total wound area. The animals were then randomized to IP and L-tryptophan or L-tryptophan only for treatment of SIB and related wounds. The IP intervention was conducted in a double-blind, randomized manner. Prayer was conducted daily for 4 weeks. Initiation of prayer was coincident with the first day of L-tryptophan administration. Physiological and behavioral variables were assessed at baseline and end of study.

RESULTS

Following IP/L-tryptophan treatment, prayer-group animals had a reduction in wound size compared to non-prayer animals (P=.028). Prayer-group animals had a greater increase in red blood cells (P=.006), hemoglobin (P=.01), and hematocrit (P=.018); a greater reduction in both mean corpuscular hemoglobin (P=.023) and corpuscular volume (P=.008); and a reduction in wound grooming (P=.01) and total grooming behaviors (P=.04) than non-prayer-group animals.

CONCLUSIONS

The results of this study are consistent with prior human trials of IP effectiveness, but suggest IP-induced health improvements may be independent of confounds associated with human participants. Findings may provide direction for study of the mechanisms of IP-induced health improvements in both human and animal models.