- Cross–sectional information of 45522 participants (≥30 years) were analyzed from the 2012 annual component of the Canadian Community Health Survey.
- Cognitive function was evaluated utilizing a single 6–level question of the Health Utilities Index.
- PA was classified according to the Physical Activity Index kilocalories per kilogram every day as active, moderately active and inactive; BMI was measured in kg/m2 and FVC (servings/day) was classified as low, moderate or high.
- To evaluate the interrelationship between FVC, BMI, PA, age and cognitive functioning, general linear models and mediation investigations were utilized.
- Higher BMIs, lower PA and FVC were connected with poorer cognitive functioning.
- Furthermore, PA statistically mediated the association between FVC and cognitive function (Sobel test: t = –3.15; P < 0.002); and higher education levels and daily FVC were connected with better cognitive function (P < 0.001).