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Table 1: Estimated prevalence for extraspinal findings, patients, and clinically significant findings
Groups Studies Total Events Proportion (95% CI) I² (%)^{^a}
All extraspinal findings 
 Overall 16^8-23 19593 6006 19.93 (11.05–30.65) 99.7
 Men 3^10,12,15 4344 1463 33.28 (24.50–42.69) 97.7
 Women 3^10,12,15 5692 2722 55.05 (12.72–93.22) 99.9
 Men and women (<40 years) 1¹⁹ 269 5 1.86 (0.61–4.28) –
 Men and women (≥40 years) 4^11,19,21,23 1261 150 13.81 (0.80–37.82) 98.9
All patients with extraspinal findings 
 Overall 10^{8-13,15,19,22,23} 14992 5215 26.65 (14.76–40.57) 99.7
 Men 3^8,10,12 2934 902 24.34 (11.03–40.81) 98.7
 Women 3^8,10,12 3490 1919 51.04 (2.91–97.76) 99.9
 Men and women (<40 years) 2^12,19 540 55 8.29 (6.09–10.79) –
 Men and women (≥40 years) 4^11,12,19,23 3961 785 16.23 (4.78–32.67) 99.0
All clinically significant findings 
 Overall 8^{10-13,15,18,22,23} 12778 901 5.35 (3.15–8.08) 97.1
 Men 3^10,12,15 4344 260 5.92 (4.61–7.39) 74.2
 Women 3^10,12,15 5692 533 9.77 (4.67–16.48) 98.3
 Men and women (≥40 years) 2^11,23 672 67 9.96 (7.80–12.36) –
Note:— Subgroups not stated if no studies reported data for such.
↵a I² not estimable for some individual subgroups and marked as en dash.