Between-night treatment effects of VR, petrolatum, and no treatment on (A) cough frequency (P = .003, 3-way treatment comparison), (B) cough severity (P = .02), (C) severity of congestion (P = .04), (D) severity of rhinorrhea (P = not significant), (E) chil... Between-night treatment effects of VR, petrolatum, and no treatment on (A) cough frequency (P = .003, 3-way treatment comparison), (B) cough severity (P = .02), (C) severity of congestion (P = .04), (D) severity of rhinorrhea (P = not significant), (E) child's ability to sleep (P < .001), (F) parent's ability to sleep (P < .001), and (G) combined symptom score (P < .001). N/S indicates nonsignificant. Ian M. Paul et al. Pediatrics 2010;126:1092-1099 ©2010 by American Academy of Pediatrics