Lifestyle factors and use of Home and Community Care services. BMI - Body Mass Index. The squares represent the relative risk estimates and the extending from the squares represent the 95% confidence intervals for the relative risks. Bigger squares represent the reference category. * Relative Risk of using HACC services. † Adjusted for age, sex, income, marital status and functional capacity. ‡ Reference Category. § Categories: Underweight (BMI<20), Normal weight (BMI 20-<25), Overweight (BMI 25-<30), Obese (BMI 30 and higher).