[Retracted] Study on the Influencing Factors of Osteoarthritis in Southern China

Table 1

The assignment of each study variable.

Variables	Assignments
Living environment	Quiet = 0 and noisy = 1
Genetic factors(family with or without a history of OA)	None = 0, 1 person = 1, 2 persons = 2, 3 and above = 3
Staple food	Mainly coarse and coarse grains = 0 and mainly polished rice and flour = 1
BMI (kg/m^2)	<23 = 0, 23∼25 = 1, and >25 = 2
Family per capita monthly income (RMB)	<2000 = 0, 2000∼5000 = 1, and >5000 = 2
Consumption of fresh vegetables	Rarely = 0, <400 g/d = 1, and ≥400 g/d = 2
Consumption of fresh fruits	Rarely = 0, <100 g/d = 1, and ≥100 g/d = 2
Egg consumption	Rarely = 0, 1∼3 eggs/week = 1, 4∼6 eggs/week = 2, and ≥7 eggs/week = 3
Consumption of soy products	Rarely = 0, <100 g/d = 1, and ≥100 g/d = 2
Smoking	None = 0 and smoking = 1
Drinking	None = 0 and drinking = 1
Difficulty in falling asleep, awakening during sleep, or dreaming often	None = 0 and yeah = 1
Have a nap habit	None = 0 and yeah = 1
Sunshine duration (h/d)	<4 = 0 and ≥4 = 1
Take part in the physical exercise	None = 0 and yeah = 1
History of joint trauma	None = 0 and yeah = 1