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Table 2: Estimated prevalence of extra-spinal findings by body region
Body Regions Studies Total Events Proportion (95% CI) I² (%)^{^a}
Gastrointestinal 
 Overall 12^{8,10-18,20,21} 16592 929 2.04 (0.29–5.22) 99.2
 Men 2^10,15 2993 254 6.90 (6.02–7.84) –
 Women 2^10,15 4019 460 8.15 (7.33–9.02) –
 Men and women (≥40 years) 2^11,21 330 8 2.31 (0.82–4.38) –
Genitourinary 
 Overall 14^8,10-22 17689 2631 8.74 (4.73–13.81) 99.1
 Men 2^10,15 2993 814 27.14 (25.56–28.75) –
 Women 2^10,15 4019 725 17.49 (16.33–18.68) –
 Men and women (<40 years) 1¹⁹ 269 0 0.19 (0.00–0.56) –
 Men and women (≥40 years) 3^11,19,21 866 82 8.93 (0.00–35.57) 98.7
Gynecologic 
 Women 3^8,10,15 4289 1004 24.03 (9.44–42.70) 99.3
Vascular 
 Overall 13^{8,10-18,20,22,23} 16941 296 1.41 (0.73–2.30) 94.0
 Men 2^10,15 2993 55 1.79 (1.34–2.30) –
 Women 2^10,15 4019 60 1.42 (1.08–1.82) –
 Men and women (≥40 years) 2^11,23 672 53 7.76 (5.84–9.92) –
Musculoskeletal 
 Overall 8^{8,12,14-17,20,21} 11537 54 0.52 (0.13–1.14) 91.1
 Men 1¹⁵ 1540 5 0.32 (0.11–0.76) –
 Women 1¹⁵ 2472 6 0.24 (0.09–0.53) –
Metastases 
 Overall 7^{8,14-17,20,21} 8513 20 0.28 (0.01–0.77) 86.9
 Men 1¹⁵ 1540 0 0.03 (0.00–0.53) –
 Women 1¹⁵ 2472 1 0.04 (0.00–0.23) –
Miscellaneous 
 Overall 7^{12,14-17,20,21} 11137 6 0.05 (0.00–0.13) 21.6
 Men 1¹⁵ 1540 0 0.03 (0.00–0.53) –
 Women 1¹⁵ 2472 0 0.02 (0.00–0.52) –
Note:— Subgroups not stated if no studies reported data for such.
↵a I² not estimable for some individual subgroups and marked as en dash.