A path analysis model suggesting the association between health locus of control and compliance with childhood vaccinations

Despite vaccines benefits, parent's vaccine hesitancy is growing. Health locus of control (HLOC) may affect decision making regarding child vaccinations. The aim of this study was to investigate the relationship between parents' HLOC and compliance with routine childhood immunization programs. A cross-sectional survey was conducted among 731 parents of children aged 3–4 years. Internal HLOC, powerful others and chance HLOC (dimensions of external HLOC), reliability of information sources, and attitudes towards vaccines were measured. Path analysis was conducted to explore direct and indirect associations between HLOC and vaccination's compliance. The results show that High powerful others HLOC has a direct association with vaccination compliance (ß = 0.23, p < 0.001). High internal and chance HLOC have indirect associations through parents' attitudes regarding vaccines. Perceived reliability of information sources was associated with not complying with vaccines (ß = −0.07, p < 0.05). For conclusions, Interaction between internal and external HLOC may explain vaccination compliance. Decreasing levels of chance HLOC and increasing powerful others HLOC may increase levels of compliance with childhood vaccinations.