Table 2 Prevalence of radiographic HOA using subgroup meta-analysis
From: The prevalence of hip osteoarthritis: a systematic review and meta-analysis
Variable | No. of studies | No. of participants | Prevalence, % (95% CI) | I2, % | P-value | |||
|---|---|---|---|---|---|---|---|---|
Q test | Subgroup difference | Egger test | Begg test | |||||
Diagnosis method subgroup | ||||||||
 Overall | 31 | 326,463 | 4.01 (2.47–6.43) | 99.6 | < 0.05 | < 0.001 |  < 0.05 |  > 0.05 |
 ACR | 7 | 24,685 | 0.77 (0.18–3.16) | 99.6 | < 0.05 | NR | NR | |
 Croft grade ≥ 2 | 1 | 7889 | 8.05 (7.47–8.67) | - | - | NR | NR | |
 Croft grade ≥ 3 | 3 | 11,327 | 3.33 (1.42–7.66) | 98.5 | < 0.05 | NR | NR | |
MJS ≤ 1.5 mm | 1 | 5839 | 3.00 (2.59–3.47) | - | - | NR | NR | |
 MJS ≤ 2 mm | 1 | 5839 | 9.40 (8.68–10.18) | - | - | NR | NR | |
MJS ≤ 2.5 mm | 1 | 5839 | 28.21 (27.07–29.38) | - | - | NR | NR | |
 JSW ≤ 2 | 2 | 4466 | 3.64 (1.76–7.39) | 93.1 | < 0.05 | NR | NR | |
 JSW ≤ 2.5 | 1 | 674 | 13.06 (7.47–15.82) | - | - | NR | NR | |
 K-L grade ≥ 2 | 19 | 244,173 | 5.85 (2.99–11.15) | 99.7 | < 0.05 | < 0.05 | > 0.05 | |
 Customb | 2 | 15,732 | 4.23 (1.69–10.19) | 99.0 | < 0.05 | NR | NR | |
Continent subgroupa | ||||||||
 Overall | 19 | 244,173 | 8.55 (4.85–13.18) | 99.5 | < 0.05 | < 0.001 | < 0.05 | > 0.05 |
 Asia | 3 | 12,618 | 4.26 (0.02–14.93) | 99.8 | < 0.05 | NR | NR | |
 North America | 7 | 210,432 | 7.95 (1.98–17.36) | 99.8 | < 0.05 | NR | NR | |
 Africa | 1 | 500 | 1.20 (0.44–2.59) | - | - | NR | NR | |
 Europe | 8 | 20,623 | 12.59 (7.17–19.25) | 99.4 | < 0.05 | NR | NR | |
Sex subgroupa | NR | NR | ||||||
 Overall | 14 | 231,767 | 8.63 (5.34–12.61) | 99.7 | < 0.05 | > 0.05 | < 0. 05 | > 0.05 |
 Male | 13 | 108,476 | 9.42 (4.81–15.34) | 99.7 | < 0.05 | < 0.05 | > 0.05 | |
 Female | 14 | 123,291 | 7.94 (3.57–13.81) | 99.7 | < 0.05 | < 0.05 | > 0.05 | |