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Table 1 Differences between demographic and clinical factors of non-functional disability and functional disability patients

From: Functional disability associated with disease and quality-of-life parameters in Chinese patients with rheumatoid arthritis

Variables

Overall sample

Non-functional disability (HAQ-DI score < 1)

Functional disability (HAQ-DI score ≥ 1)

P-value

Female gender, no. (%)

85 (84.2)

72 (84.7)

13 (81.2)

0.715

Age, years

54.9 ± 11.9

54.9 ± 12.2

55.3 ± 10.3

0.904

BMI, kg/m2

22.5 ± 3.1

22.3 ± 2.9

23.7 ± 3.6

0.089

Education, years, no. (%)

   

0.755

  < 9 years

76 (75.2)

63 (74.1)

13 (81.2)

 

  ≥ 9 years

25 (24.8)

22 (25.9)

3 (18.8)

 

Income/person/month, no. (%)

   

0.454

  ≤ 1000 Yuan

54 (53.5)

43 (50.6)

11 (68.8)

 

 1000–3000 Yuan

36 (35.6)

33 (38.8)

3 (18.8)

 

 3000–5000 Yuan

7 (6.9)

6 (7.1)

1 (6.2)

 

  ≥ 5000 Yuan

4 (4.0)

3 (3.5)

1 (6.2)

 

Working status, no. (%)

   

0.512

 Employed

21 (20.8)

19 (22.4)

2 (12.5)

 

 Unemployed

80 (79.2)

66 (77.6)

14 (87.5)

 

Health insurance, yes, no. (%)

65 (64.4)

55 (64.7)

10 (62.5)

0.938

Comorbidities, yes, no. (%)

53 (52.5)

43 (50.6)

10 (62.5)

0.425

Disease duration, years

8.0 ± 8.4

7.1 ± 7.7

13.1 ± 10.5

0.042*

VAS pain score (range 0–100)

42.6 ± 26.2

37.6 ± 23.9

69.1 ± 22.4

<0.001**

TJC (28 joints)

4.2 ± 6.1

3.1 ± 4.9

9.5 ± 9.0

0.013*

SJC (28 joints)

2.5 ± 3.5

2.0 ± 3.2

5.1 ± 4.1

0.001**

DAS28

3.5 ± 1.5

3.2 ± 1.4

4.9 ± 1.6

<0.001**

ESR, mm/h

25.7 ± 25.6

23.8 ± 23.7

36.1 ± 33.1

0.077

CRP, mg/l

15.6 ± 24.4

14.1 ± 23.4

23.6 ± 28.6

<0.001**

RF positivity, yes, no. (%)

77 (76.2)

63 (74.1)

14 (87.5)

0.346

Medication adherence, yes, no. (%)

40 (39.6)

37 (43.5)

3 (18.8)

0.024*

Grip strength Ç‚ (kg)

13.9 ± 9.0

14.9 ± 9.1

9.0 ± 6.7

0.016*

Pinch strength Ç‚ (kg)

3.3 ± 2.3

3.4 ± 2.3

2.7 ± 1.9

0.205

Wrist flexion Ç‚ (degrees)

39.7 ± 16.6

42.8 ± 14.7

23.3 ± 17.0

<0.001**

Wrist extension Ç‚ (degrees)

36.3 ± 15.4

39.8 ± 13.0

18.3 ± 14.9

<0.001**

Shoulder flexion Ç‚ (degrees)

129.0 ± 29.4

133.1 ± 26.0

107.1 ± 37.1

0.001**

Shoulder abduction Ç‚ (degrees)

126.6 ± 30.2

130.1 ± 25.9

107.8 ± 43.4

0.063

Elbow flexion Ç‚ (degrees)

124.2 ± 26.5

127.3 ± 23.2

107.8 ± 36.4

0.006**

Hip flexion Ç‚ (degrees)

77.0 ± 18.5

78.1 ± 17.0

71.2 ± 24.9

0.304

Knee flexion Ç‚ (degrees)

98.5 ± 27.3

102.9 ± 21.9

75.0 ± 39.7

0.014*

Ankle dorsiflexion Ç‚ (degrees)

12.3 ± 10.2

12.3 ± 10.6

12.0 ± 8.3

0.910

Ankle plantarflexion Ç‚ (degrees)

44.3 ± 14.7

45.8 ± 14.2

36.4 ± 14.9

0.017*

  1. Values are presented as the number (%) or the mean ± SD. HAQ-DI the health assessment questionnaire-disability index, BMI body mass index, VAS visual analog scale, TJC tender joint count, SJC swollen joint count, DAS28 Disease Activity Score in 28 joints, ESR erythrocyte sedimentation rate, CRP C-reactive protein, RF rheumatoid factor. ǂ Mean of right and left sides. *P < 0.05, **P < 0.01