Therapeutic Positioning for Gastroesophageal Reflux in Infants: Systematic Review of Head-Elevation and Prone Positioning

Abstract

Introduction: Gastroesophageal reflux (GER) is common in healthy infants, causing parental distress and medication overuse. Non-pharmacological positioning (head-elevation, left side, prone) is recommended, but evidence quality and comparative efficacy are unclear.

Methods: We searched PubMed, CINAHL, and Scopus for RCTs and crossover studies of positional interventions for GER in infants <12 months (without neurological or surgical conditions). Primary outcome: reflux index (RI, % time esophageal pH <4) by pH-impedance or scintigraphy. Secondary: symptom frequency (regurgitation episodes/day). Random-effects meta-analysis.

Results: Fourteen studies (n=512 infants) met inclusion. Compared to supine flat: prone position significantly reduced RI (mean difference –4.2%, 95% CI –6.1 to –2.3, p<0.001) but is associated with sudden infant death syndrome (SIDS) risk and not recommended for sleep. Left side position also reduced RI (–3.1%, –4.9 to –1.3). Head-of-bed elevation (30°) was not effective (mean difference –0.4%, –1.7 to +0.9) except in infants with hiatal hernia (subgroup). Right side position worsened RI (+2.8%, +0.9 to +4.7). Regurgitation frequency mirrored pH-metry results.

Discussion: Prone and left side positions reduce GER but are safe only during awake supervised periods. Head elevation is ineffective due to lack of effect on lower esophageal sphincter. Supine position remains safest for sleep despite higher reflux. Limitation: most studies before 2010, before impedance monitoring standard.

Conclusions: For awake infants with GER, supervised prone positioning is most effective. For sleep, supine positioning is mandatory despite lesser efficacy. Head elevation does not reduce reflux and should be abandoned.