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Table 2 Positivity of B-Mode and Power-Doppler-Mode in Arthritis and Control Groups

From: Development and validation of a pediatric internationally agreed ultrasound knee synovitis protocol (PIUS-knee) by the PReS imaging working party

Arthritis group (n = 137 knee joints)

Control group (n = 66 knee joints)

B-Mode findings

 Region

Positive

n (%)

Negative

n (%)

Positive

n (%)

Negative

n (%)

P*

30°

 Longitudinal

133 (97.1)

4 (2.9)

4 (6.1)

62 (93.9)

< 0.001

 Transverse

131 (95.6)

6 (4.4)

4 (6.1)

62 (93.9)

< 0.001

0°

 Longitudinal

135 (98.5)

2 (1.5)

2 (3.0)

64 (97.0)

< 0.001

 Transverse

134 (97.8)

3 (2.2)

3 (4.5)

63 (95.5)

< 0.001

 Long. Lateral

118 (86.1)

19 (13.9)

2 (3.0)

64 (97.0)

< 0.001

 Long. Medial

106 (77.4)

31 (22.6)

1 (1.5)

65 (98.5)

< 0.001

 PP-lateral

122 (89.1)

15 (10.9)

2 (3.0)

64 (97.0)

< 0.001

 PP-medial

121 (88.3)

16 (11.7)

2 (3.0)

64 (97.0)

< 0.001

Power-Doppler Mode findings

 30°

  Longitudinal

72 (52.6)

65 (47.4)

0 (0)

66 (100)

< 0.001

  Transverse

88 (64.2)

49 (35.8)

0 (0)

66 (100)

< 0.001

0°

 Longitudinal

59 (43.4)

77 (56.6)

0 (0)

66 (100)

< 0.001

 Transverse

75 (54.7)

62 (45.3)

0 (0)

66 (100)

< 0.001

 Long. Lateral

93 (67.9)

44 (32.1)

1 (1.5)

65 (98.5)

< 0.001

 Long. Medial

69 (50.4)

68 (49.6)

0 (0)

66 (100)

< 0.001

 PP-lateral

94 (68.6)

43 (31.4)

1 (1.5)

65 (98.5)

< 0.001

 PP-medial

92 (67.2)

45 (32.8)

0 (0)

66 (100)

< 0.001

  1. Abbreviations: Long Longitundinal
  2. *Fisher’s Exact Test