Perceived Infant Discomfort Linked to Lower Maternal Oral Health Quality of Life: Results from a Cross-Sectional Study

Aim: We aimed to explore whether there is an association between maternal perceived infant discomfort due to suggestive gastrointestinal alterations and oral-health-related quality of life (OHRQoL) through a survey. Materials and Methods: The present study included two main phases involving Portuguese-speaking parents with full-term infants aged 2–12 weeks old who were not previously hospitalized in a neonatal nursery. First, the original French Infant Colic Questionnaire (ColiQ) was translated, cross-culturally adapted and validated to Portuguese (ColiQ-PT). Then, a survey was distributed, and included sociodemographics, the ColiQ-PT, an oral health value scale, OHRQoL, self-perceived periodontal status, and smoking and oral health habits. Data were analyzed through inferential, correlation and multivariate logistic models in this cross-sectional study. Results: The ColiQ-PT revealed reliability and validity. From a total of 421 responses, higher infant discomfort was correlated with less maternal professional dental care prioritization (ρ = −0.096, p < 0.05). Self-perceived periodontitis correlated with all items of OHRQoL (p < 0.001), all seven OHIP-14 domains, and with the physical (p < 0.001), psychological (p = 0.006), and social (p = 0.011) super-domains. While the infant-related score was associated with baby age (p = 0.023) and physical pain (p = 0.040) related to OHRQoL, the parent score was associated with education (p = 0.005), unemployment (p = 0.035), and physical pain (p = 0.017). The total ColiQ-PT score was significantly associated with more deteriorated social disability related to maternal OHRQoL (ρ = −0.130, p < 0.05). Conclusions: Perceived infant discomfort seems to be linked to maternal deteriorated OHRQoL. This finding highlights the importance of prioritizing oral health in postpartum care. Further research is needed to explore the mechanisms underlying this association and to develop targeted interventions.