borderline significanceP = 0.020
Chinese medicine hospital (OR = 2.10, P = 0.036) and primary care institutions (OR = 1.42, P = 0.038) outpatient care showed borderline significance. 60–74 years: Females (OR = 1.35, P = 0.020) and difficulty in stooping, kneeling or crouching (linear trend OR = 1.46, P = 0.002) were significant.