The Survey of Knee Osteoarthritis in the Population over Age 50 Visited in the Health Bus in Kermanshah, Iran

Table 4

Determination of prevalence of joint stiffness at different times.

Level of stiffness	How severe is your stiffness first after awakening in the morning?	How severe is your stiffness after sitting, lying, or resting later in the day?
None	393	383
	66.7%	65.0%
Mild	81	96
	13.8%	16.3%
Moderate	61	66
	10.4%	11.2
Severe	49	39
	8.3%	6.6%
Extreme	5	5
	0.8	0.8%