Table 1 Clinical characteristics of the participants

Age, years

50.6±13.9

55.7±14.1

0.118

49.8±13.1

53.7±10.8

0.039

BMI, kg/m ²

23.5±2.8

24.6±2.3

0.092

21.7±2.8

23.4±4.6

0.027

KOOS

 Symptom

96.2±4.7

73.9±16.2

<0.001

95.5±5.1

78.5±14.2

<0.001

 Pain

97.9±4.3

75.8±11.8

<0.001

97.8±4.0

75.4±14.2

<0.001

 Function

99.5±1.3

87.9±17.4

<0.001

99.3±1.8

88.1±12.4

<0.001

 QOL

94.5±9.1

55.9±17.4

<0.001

90.7±13.1

57.9±15.7

<0.001

KLG 0, n (%)

130 (78)

14 (82)

0.725

135 (73)

25 (66)

0.343

Effusion- area (mm ² )

39.9±34.2

54.6±39.5

0.048

31.2±30.8

50.9±48.1

0.002