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Changes in the quality of life of Tanzanian school children after treatment interventions using the Child-OIDP.

This study aimed to examine the evaluative properties of the Child Oral Impacts on Daily Performances (Child-OIDP) inventory and to estimate treatment-associated changes in the OIDP and self-reported oral health following atraumatic restorative treatment (ART) and oral health education (OHE). A total of 1,306 school attendees in Kilwa, Tanzania, completed the Child-OIDP inventory before, and 6 months after, treatment. The post-treatment questionnaire assessed change in perceived oral health. Complete baseline and follow-up data were obtained for 104, 117, and 1,085 participants who received, respectively, ART fillings (Group A), ART fillings and tooth extraction (Group B), and OHE only (Group C). The longitudinal validity, responsiveness, and treatment-associated changes were calculated using anova, effect sizes, and repeated general linear models (GLM). The follow-up prevalence was 73.8%. The mean changes in the OIDP total- and subscale scores were negative within those who reported 'worsened' oral health, and positive in subjects reporting 'improved' oral health. Effect sizes for the total OIDP score ranged from -0.2 within the category 'worsened' to 0.4 within the category 'improved'. Changes following treatment were more extensive in Group B compared with Groups A and C, and in Group C compared with Group A. The Child-OIDP showed promising evaluative properties and responsiveness to change following ART fillings, ART fillings and tooth extraction, and OHE.