Periodontal Status as Mediator of the Association between Socioeconomic Status and Oral Health-Related Quality of Life in Pregnant Women
2021
Objective To test periodontal status as a mediator between socioeconomic status (SES) and oral health-related quality of life (OHRQoL) in pregnant women. Basic research design Secondary cross-sectional analysis of baseline data from a randomised clinical trial with 303 pregnant women. Main outcome measures Demographic variables, SES, smoking, interproximal hygiene, and self-reported gingival bleeding were collected as independent variables. The Oral Health Impact Profile-14 was used to assess OHRQoL. The relationship between SES, periodontal status and OHRQoL was investigated in structural equation modelling. Results There was a moderate association of SES with periodontal status (standardised coefficient SC = -0.26, p⟨0.01) and number of teeth (SC = 0.24, p⟨0.01). Periodontal status and the number of teeth were also associated with OHRQoL (respectively, SC = 0.25, p⟨0.01 and SC = -0.31, p⟨0.01), but SES was only indirectly related to OHRQoL (SC = -0.17, p⟨0.01). Socioeconomic inequalities in quality of life were mainly explained by the remaining number of teeth, contributing to about 47%, and periodontal status, contributing to about 41%. Conclusions There was no direct effect of SES on OHRQoL in pregnant women. Periodontal status and missing teeth each explained almost half of the total indirect association.
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