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Table 1 Baseline characteristics of 6436 patients with rheumatoid arthritis observed for 32,324 person-years with semiannual Health Assessment Questionnaires

From: Percentile benchmarks in patients with rheumatoid arthritis: Health Assessment Questionnaire as a quality indicator (QI)

Patients

Age (years)

Level of education (years)

Disease duration (years)

Number of HAQ-DI measurements

HAQ-DI

Patients receiving methotrexate

Patients receiving prednisone

Women

     

21.2%

23.7%

   Median

57.3

12.0

8.1

7

1.25

  

   IQR

46.8–67.0

12.0–14.0

2.4–16.7

4–14

0.63–1.88

  

Men

     

18.5%

23.9%

   Median

61.0

12.0

7.4

7

1.00

  

   IQR

51.4–69.0

11.0–14.0

2.0–16.6

3–12

0.25–1.50

  

All patients

     

20.5%

23.8%

   Median

58.5

12.0

8.0

7

1.13

  

   IQR

48.0–67.4

12.0–14.0

2.3–16.7

4–13

0.5–1.8

  
  1. HAQ-DI, Health Assessment Questionnaire Disability Index (range 0–3); IQR, interquartile range.