Table 5 – Association between clinical-laboratory variables and ultrasound findings (qualitative and semiquantitative gray scale)

Disease activity

4 (p = 0.241)

3 (p = 0.551)

2 (p = 0.967)

6 (p = 0.079)

4 (p = 0.471)

Muscle enzymes elevation

2 (p = 0.164)

2 (p = 0.244)

2 (p = 0.360)

2 (p = 0.028)

2 (p = 0.070)

Altered NC

6 (p = 0.334)

4 (p = 0.889)

4 (p = 0.827)

8 (p = 0.334)

6 (p = 0.776)

DAS

10 (p = 0.002)

9 (p = 0.005)

8 (p = 0.007)

14 (p = 0.002)

12 (p = 0.013)

MMT

10 (p = 0.533)

9 (p = 0.433)

8 (p = 0.340)

14 (p = 0.964)

12 (p = 0.747)

CMAS

10 (p = 0.170)

9 (p = 0.312)

8 (p = 0.315)

14 (p = 0.334)

12 (p = 0.360)

Physician´s VAS

10 (p = 0.110)

9 (p = 0.266)

8 (p = 0.340)

14 (p = 0.05)

12 (p = 0.307)

Patients and parent´s VAS

10 (p = 0.173)

9 (p = 0.327)

8 (p = 0.389)

14 (p = 0.194)

12 (p = 0.493)

Semi-quantitative Gray Scale (moderate alteration/ important alteration)

Disease activity

2/9

(p = 0.007)

1/10

(p < 0.001)

3/7

(p = 0.198)

0/11

(p = 0.005)

5/6

(p = 0.475)

Muscle enzymes elevation

3/14 (p < 0.001)

6/11 (p = 0.157)

9/8

(p = 0.208)

3/13 (p = 0.563)

5/10 (p = 0.820)

Altered NC

7/13

(p = 0.094)

6/13

(p = 0.289)

5/13

(p = 0.033)

3/15

(p = 0.206)

9/11

(p = 0.296)

DAS

16/24

(p = 0.063)

14/25

(p = 0.025)

19/19

(p = 0.037)

4/36

(p = 0.138)

16/23

(p = 0.089)

MMT

16/24

(p = 0.003)

14/25

(p = 0.063)

19/19

(p < 0.001)

4/36

(p = 0.123)

16/23

(p = 0.813)

CMAS

16/24

(p = 0.008)

14/25

(p = 0.006)

19/19

(p = 0.006)

4/36

(p = 0.015)

16/23

(p = 0.929)

Physician´s VAS

16/24

(p = 0.092)

14/25

(p = 0.015)

19/19

(p = 0.088)

4/36

(p = 0,377)

16/23

(p = 0,081)

Patients and parent´s VAS

16/24

(p = 0.924)

14/25

(p = 0.140)

19/19

(p = 0.017)

4/36

(p = 0.165)

16/23

(p = 0.460)