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Table 2 Characteristics of study subjects

From: Identifying discriminative features for diagnosis of Kashin-Beck disease among adolescents

Variables

KBD (n = 400)

n (%);

Non-KBD (n = 400)

n (%);

χ2(t)

P value

Age

  < 6

5 (1.25)

23 (5.75)

343.17

 < 0.001***

 6 ~ 10

84 (21.00)

326 (81.50)

  

 10 ~ 14

258 (64.50)

48 (12.00)

  

  > 14

53 (13.25)

3 (0.75)

  

Male

228 (57.00)

222 (55.00)

0.18

0.669

Clinical grading

  

-

-

 I°

326 (81.50)

-

  

 II°

70 (17.50)

-

  

 III°

4 (1.00)

-

  

Clinical manifestations

 Joint pain

13 (4.18)

4 (1.30)

4.58

0.032*

 Morning stiffness

4 (1.29)

-

2.16

0.142a

 Joint friction sound

1 (0.30)

-

-

1.000b

 Dwarfism

-

-

-

-

 Short humerus

4 (1.29)

-

2.16

0.142a

 Short fingers

9 (2.89)

-

6.93

0.008**

 Flexion of the distal part of fingers

167 (41.75)

25 (6.25)

138.19

 < 0.001**

 Wrist joint movement limitation

14 (3.50)

-

14.25

 < 0.001**

 Elbow joint movement limitation

38 (9.50)

-

39.90

 < 0.001**

 Shoulder joint movement limitation

1 (0.25)

-

-

1.000b

 Ankle joint movement limitation

49 (12.25)

2 (0.50)

46.26

 < 0.001**

 Knee joint movement limitation

6 (1.50)

-

8.36

0.040*a

 Squatting limitation

92 (29.58)

4 (1.33)

92.01

 < 0.001**

 Enlarged finger joint

71 (17.75)

2 (0.50)

71.77

 < 0.001**

 Enlarged elbow joint

4 (1.00)

-

5.57

0.018*a

 Enlarged knee joint

1 (0.25)

-

-

1.000b

 Enlarged ankle joint

6 (1.5)

-

8.36

0.040*a

 Deformed finger joint

20 (5.00)

2 (0.50)

15.14

 < 0.001**

 Deformed wrist joint

2 (0.50)

-

2.78

0.096a

 Deformed elbow joint

5 (1.25)

-

6.96

0.008*a

 Deformed knee joint

5 (1.25)

-

6.96

0.008*a

 Deformed ankle joint

5 (1.25)

-

6.96

0.008*a

X-ray pathological changes

 Metaphysis

75 (24.11)

21 (7.00)

33.78

 < 0.001**

 Distal end of phalanges

190 (61.09)

53 (17.67)

120.22

 < 0.001**

 Epiphysis

4 (1.29)

-

2.16

0.124a

 Carpals

10 (3.22)

3 (1.00)

3.60

0.058

  1. *p < 0.05; **p < 0.01
  2. a2 cells (50.0%) have expected count less than 5. The minimum expected count is between 1 and 5. Likehood ratio is adopted
  3. b2 cells (50.0%) have expected count less than 5. The minimum expected count is 0.49. Fisher’s Exact Test is adopted
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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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