Table 4 Country-specific self-reported arthritis prevalence (weighted), across age strata, educational attainment and marital status, stratified by sex

China

n = 1851

Ghana

n = 350

India

n = 946

Mexico

n = 206

Russian Federation

n = 1049

South Africa

n = 601

 18–29

3.7% (0.9%–14.5%)

4.4% (1.3%–13.8%)

2.9% (1.9%–4.2%)

0.4% (0.1%–2.8%)

4.0% (0.6%–22.1%)

8.9% (1.8%–34.2%)

 30–39

6.0% (3.8%–9.5%)

3.0% (0.9%–9.2%)

8.5% (6.7%–10.7%)

1.8% (0.5%–6.0%)

14.7% (7.0%–28.3%)

0.2% (0.0%–1.6%)

 40–49

15.1% (11.2%–20.0%)

3.6% (1.6%–8.1%)

12.2% (9.6%–15.3%)

7.9% (2.2%–24.5%)

21.4% (10.5%–38.6%)

11.3% (5.6%–21.4%)

 50–59

22.1% (20.0%–24.4%)

11.5% (9.1%–14.5%)

19.8% (16.7%–23.2%)

6.6% (2.3%–17.5%)

21.1% (15.6%–27.9%)

29.2% (24.6%–34.2%)

 60–69

29.7% (27.1%–32.6%)

15.4% (12.1%–19.5%)

21.4% (16.7%–26.9%)

13.0% (8.8%–18.7%)

36.4% (29.6%–43.8%)

31.5% (25.7%–38.0%)

 70+

29.2% (26.7%–31.9%)

22.8% (18.6%–27.6%)

23.5% (18.8%–29.0%)

22.9% (11.2%–41.1%)

45.7% (39.1%–52.3%)

26.5% (20.7%–33.2%)

 Never schooled

24.1% (19.9%–28.8%)

9.5% (7.0%–12.7%)

12.6% (10.9%–14.6%)

11.0% (4.7%–23.5%)

51.8% (31.0%–72.1%)

17.5% (12.8%–23.5%)

  ≤ Primary school

18.1% (13.7%–23.6%)

5.2% (2.9%–9.3%)

12.7% (10.5%–15.3%)

7.4% (3.7%–14.4%)

42.4% (33.0%–52.4%)

31.1% (21.0%–43.5%)

 Secondary school

13.0% (10.1%–16.5%)

4.6% (2.4%–8.9%)

5.5% (4.0%–7.5%)

3.1% (1.3%–7.4%)

25.0% (20.0%–30.8%)

8.4% (4.8%–14.3%)

 College

4.7% (1.6%–13.1%)

1.6% (0.7%–4.0%)

6.7% (2.7%–15.6%)

1.6% (0.7%–3.6%)

15.1% (10.0%–22.2%)

1.5% (0.6%–3.6%)

 Never married

0.9% (0.3%–3.0%)

7.8% (2.3%–23.2%)

1.1% (0.4%–3.0%)

1.3% (0.7%–2.4%)

7.8% (4.4%–13.4%)

12.1% (5.5%–24.7%)

 Married

14.7% (12.6%–17.2%)

3.5% (2.1%–6.0%)

10.3% (9.1%–11.7%)

4.3% (2.5%–7.3%)

17.4% (12.4%–24.0%)

9.2% (5.5%–14.9%)

 Divorced/widowed

25.2% (19.9%–31.5%)

11.7% (8.9%–15.1%)

19.1% (15.9%–22.7%)

19.0% (8.1%–38.4%)

36.4% (29.1%–44.4%)

19.3% (12.8%–28.1%)

China

n = 1145

Ghana

n = 230

India

n = 578

Mexico

n = 77

Russian Federation

n = 363

South Africa

n = 271

 18–29

1.3% (0.2%–8.8%)

−

2.1% (1.0%–4.7%)

−

−

0.7% (0.1%–3.4%)

 30–39

5.5% (2.4%–12.1%)

0.2% (0.0%–1.4%)

6.1% (3.8%–9.8%)

−

14.6% (5.4%–34.1%)

1.3% (0.3%–5.8%)

 40–49

12.0% (7.9%–18.0%)

3.7% (1.5%–8.7%)

7.9% (5.1%–12.1%)

2.9% (0.6%–13.2%)

4.7% (1.3%–15.9%)

0.9% (0.3%–3.0%)

 50–59

13.7% (11.8%–15.8%)

7.4% (5.4%–10.1%)

13.7% (11.3%–16.5%)

0.9% (0.3%–2.6%)

21.6% (9.5%–42.2%)

12.6% (9.3%–16.8%)

 60–69

20.0% (17.7%–22.5%)

11.6% (8.6%–15.4%)

16.9% (13.8%–20.6%)

8.0% (4.7%–13.3%)

21.3% (15.2%–29.0%)

28.2% (22.1%–35.2%)

 70+

22.9% (20.7%–25.2%)

16.7% (12.6%–21.7%)

17.8% (14.5%–21.7%)

9.7% (6.3%–14.5%)

37.85 (30.3%–46.0%)

20.9% (13.5%–30.9%)

 Never schooled

22.3% (13.2%–35.2%)

6.3% (4.5%–8.7%)

9.0% (6.7%–12.1%)

7.7% (3.2%–17.3%)

4.4% (0.6%–26.8%)

10.4% (6.0%–17.6%)

  ≤ Primary school

14.8% (10.3%–20.7%)

2.9% (1.6%–4.9%)

9.0% (6.6%–12.1%)

3.7% (1.8%–7.7%)

39.6% (21.3%–61.4%)

7.1% (4.4%–11.2%)

 Secondary school

9.2% (7.3%–11.5%)

4.6% (2.3%–8.9%)

8.5% (6.4%–11.3%)

0.3% (0.1%–0.7%)

11.9% (7.2%–19.0%)

2.2% (1.1%–4.6%)

 College

7.4% (3.8%-13.95)

2.3% (1.1%–4.9%)

4.1% (2.0%–8.0%)

0.2% (0.0%–1.1%)

9.4% (3.1%–25.1%)

2.3% (0.9%–6.1%)

 Never married

3.0% (1.5%–5.9%)

0.3% (0.1%–1.0%)

3.9% (1.5%–9.5%)

0.1% (0.0%–0.5%)

0.9% (0.3%–3.1%)

2.0% (0.8%–4.7%)

 Married

11.9% (9.4%–14.8%)

4.5% (3.1%–6.5%)

8.8% (7.2%–10.7%)

2.2% (1.1%–4.4%)

11.3% (7.5%–16.7%)

5.6% (4.1%–7.6%)

 Divorced/widowed

11.8% (8.7%–15.7%)

8.5% (5.4%–13.2%)

6.5% (3.8%–10.7%)

6.6% (3.3%–12.6%)

33.5% (13.3%–62.3%)

13.2% (5.6%–27.9%)