Motivational interviewing effects on caries prevention in children differ by income: A randomized cluster trial

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One hundred and eighty‐six were included in the CE group and 228 in the MI group. Even the caries rate per 100 surface‐year was 1.29 (95%CI: 0.92‐1.80) in the CE group and 0.46 (95%CI: 0.29‐0.73) from the MI group. The consequence of MI was statistically significant in the lower‐income group (P = .03); MI averted 57 percent of carious lesions (IRR = 0.43, 95% CI 0.22‐0.83) and decreased the occurrence of this disease on more than one surface per 100 followed surface‐year in exactly the same group at the equivalent income subgroup (IRD = −1.37, P = .04).
Motivational interviewing experienced a preventive effect against caries in children whose households are of lower income.


A cluster‐randomized, double‐blind study with two parallel groups in healthcare clinical settings (HCCs) assessing traditional oral health education (CE) and MI aimed at mothers of kids born in 2013 and 2014. The oral health group of 6 of the 12 HCCs were trained in MI. This training has been intensive for active learning of the basic MI fundamentals, conducted by a psychologist who’s a PhD in psychiatry and has extensive expertise in running MI training classes. It was held at an experiential format divided in to two 4‐hour shifts, using a 1‐week interval. Kids who attended at least one dental visit in the very first year of life in their HCC were clinically assessed by trained examiners and parents responded to a poll. The effect of MI on the caries outcome compared with CE has been assessed in various subgroups: household income, mother’s education and skin colour.


This research aimed to explore the differential preventive impact of motivational interviewing (MI) on early childhood caries (ECC) based on socioeconomic factors, with a community‐based trial in a public health care setting.

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