Methods: this cross-sectional analysis used data of n = 3,108 individuals aged 58-82 from a population-based prospective cohort study. Body mass index (BMI) and waist-to-height ratio (WHtR) were calculated based on clinical examinations. Health service use was measured by a questionnaire for a 3-month period. Corresponding costs were calculated applying a societal perspective.
Results: 21.8% of the sample were normal weight, 43.0% overweight, 25.5% obese class 1 and 9.6% obese class a parts per thousand yen2 according to BMI. In 42.6%, WHtR was a parts per thousand yen0.6. For normal weight, overweight, obese class 1 and obese class a parts per thousand yen2 individuals, mean costs (3-month period) of outpatient care were 384a,not sign, 435a,not sign, 475a,not sign and 525a,not sign (P 〈 0.001), mean costs of inpatient care were 284a,not sign, 408a,not sign, 333a,not sign and 652a,not sign (P = 0.070) and mean total costs 716a,not sign, 891a,not sign, 852a,not sign and 1,244a,not sign (P = 0.013). For individuals with WHtR 〈 0.6 versus a parts per thousand yen0.6, outpatient costs were 401a,not sign versus 499a,not sign (P 〈 0.001), inpatient costs 315a,not sign versus 480a,not sign (P = 0.016) and total costs 755a,not sign versus 1,041a,not sign (P 〈 0.001). Multiple regression analyses controlling for sociodemographic variables showed a significant effect of obesity on costs of outpatient care (class 1: +72a,not sign; class a parts per thousand yen2: +153a,not sign) and total costs (class a parts per thousand yen2: +361a,not sign) while the effect of overweight was not significant. WHtR a parts per thousand yen0.6 significantly increased outpatient costs by +79a,not sign and total costs by +189a,not sign.
Conclusions: excess weight is associated with increased service use and cost in elderly individuals, in particular in obese class a parts per thousand yen2 individuals.
Type of Publication:
Journal article published