Enhancing oral health via sense of coherence: a cluster-randomized trial

Sense of coherence (SOC) has been related to oral health behaviors and oral-health-related quality of life (OHRQoL) in observational studies. This cluster-randomized trial aimed to test the effect of an intervention to enhance SOC on OHRQoL in children. Twelve primary schools were randomly allocated to intervention and control groups. The intervention was comprised of 7 sessions over 2 mos, focusing on child participation and empowerment. The first 4 sessions were classroom activities, and the last 3 involved working on healthy school projects. Trained teachers who received a one-day course delivered the intervention. Socio-demographic and clinical data, together with self-reported measures of OHRQoL, SOC, and oral health beliefs, were obtained from 261 total 10- to 12-year-olds (133 in the intervention and 128 in the control groups). Data were collected at baseline, 2 wks after the intervention, and at three-month follow-up. Mixed-effects models indicated that the intervention increased SOC and improved OHRQoL, together with oral health beliefs and gingival health. The findings offer experimental evidence that OHRQoL can be influenced by SOC. SOC may also provide an avenue for oral health promotion (Australian New Zealand Clinical Trials Registry ACTRN12612000547842).