Table 2 Test-retest reliability (κ statistic) of the 11 items in the Chinese version of the Early Inflammatory Arthritis detection tool (N = 74)

1. Do you have pain in your joints?

0.73 (0.57–0.89)

2. Do you have pain in your wrists and hands?

0.67 (0.50–0.84)

3. Are your hands or wrists swollen?

0.42 (0.24–0.60)

4. Do you have trouble making a fist?

0.53 (0.27–0.79)

5. Are your joints stiff in the morning?

0.76 (0.61–0.91)

6. From the time you wake in the morning, does it take more than 60 min for your joints to move more freely?

0.47 (0.16–0.78)

7. Are the same joints involved on both sides of your body?

0.76 (0.60–0.92)

8. Have important activities in your life been affected because of bone or joint problems, such as having difficulty with personal care or having to make a change regarding leisure or work activities?

0.55 (0.35–0.76)

9. Have you ever been told that you have rheumatoid arthritis?

0.81 (0.67–0.94)

10. Does anyone in your family have rheumatoid arthritis?

0.94 (0.82–1.00)

11. Have you been diagnosed with a rash called psoriasis?

0.86 (0.72–1.00)