Treatment group of participants
0 = Group A (ERGON Technique)
1 = Group B (PNF stretching)

Gender of participants
0 = Male
1 = Female

Marital status of participants
0 = Married
1 = Unmarried
2 = Widow
3 = Divorced

Education of participants
0 = No formal education
1 = Up to primary
2 = Up to secondary
3 = Above secondary

Classification of Weight Status of participants by Body Mass Index (BMI)
0 = Below 18.5 (Underweight)
1 = 18.5 – 24.9 (Healthy Weight)
2 = 25.0 – 29.9 (Overweight)
3 = 30.0 and Above (Obese)

0 = ≤1 year
1 = 1-2 years
2 = 3-4 years
3 = 5-6 years
4 = 7-8 years
5 = 9-10 years

Do you have unilateral or bilateral knee OA
0 = Unilateral
1 = Bilateral

Grade of Knee Osteoarthritis according to Kellgreen and Lawrence criteria:
0 = Grade 1
1 = Grade 2

Side of knee OA
1 = Right
2 = Left
3 = Bilateral

Rate your pain when walking (Baseline assessment)
0 = None
1 = Slight
2 = Moderate
3 = Severe
4 = Extreme

Classification of pain on WOMAC scale at baseline assessment
1 = 0-5 Mild pain
2 = 6-10 Moderate pain
3 = 11-15 Severe pain
4 = 16-20 Extreme pain

Classification of stiffness on WOMAC scale at baseline assessment
0 = No stiffness
1 = 1-2 Mild stiffness
2 = 3-4 Moderate Stiffness
3 = 5-6 Severe Stiffness
4 = 7-8 Extreme Stiffness

Classification of physical function on WOMAC scale at baseline assessment
1 = 0-17 Mild
2 = 18-34 Moderate
3 = 35-51 Severe
4 = 52-68 Extreme

Classification of WOMAC total score at baseline assessment
1 = 0-24 Mild
2 = 25-48 Moderate
3 = 49-72 Severe
4 = 73-96 Extreme