Correlation between Kellgren-Lawrence classification of osteoarthritis and Knee Injury and Osteoarthritis Outcome Score

Table 2 Comparison of age of patients with different domains of Knee Injury and Osteoarthritis Outcome Score

Domain scale (0-100)	Age	Number	Mean	SD	P value
Pain	< 18	4	75.69	7.98	< 0.001
	19-29	8	68.06	23.00
	30-39	12	53.94	26.34
	40-49	29	51.72	21.38
	50-59	49	49.60	23.06
	≥ 60	62	38.40	21.83
Symptoms	< 18	4	70.54	6.10	0.573
	19-29	8	64.73	7.50
	30-39	12	59.23	6.18
	40-49	29	58.00	17.57
	50-59	49	57.87	15.36
	≥ 60	62	57.20	18.66
Activities of daily living	< 18	4	86.40	10.36	< 0.001
	19-29	8	79.41	18.20
	30-39	12	67.65	25.81
	40-49	29	60.95	20.49
	50-59	49	55.25	24.08
	≥ 60	62	46.54	22.09
Sport and recreation function	< 18	4	70.00	20.00	< 0.001
	19-29	8	68.75	30.68
	30-39	12	55.00	30.90
	40-49	29	43.10	30.37
	50-59	49	38.27	31.55
	≥ 60	62	30.32	26.96
Knee-related quality of life	< 18	4	56.25	13.50	< 0.001
	19-29	8	66.41	30.42
	30-39	12	52.60	25.76
	40-49	29	46.34	23.24
	50-59	49	44.01	19.97
	≥ 60	62	34.38	18.55

The age wise comparison of five outcome scale is shown in Table 2. Scores range from 0 (worst) to 100 (best). Statistical analysis was performed using one-way analysis of variance.