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Table 2 The distribution of urate deposits in the metatarsal heads (n = 144 patients)

From: Urate crystal deposition and bone erosion in gout: ‘inside-out’ or ‘outside-in’? A dual-energy computed tomography study

  Metatarsal head 1 (n = 288) Metatarsal head 2 (n = 287) Metatarsal head 3 (n = 287) Metatarsal head 4 (n = 287) Metatarsal head 5 (n = 284) All metatarsal heads (n = 1433)
Urate deposit in joint, n (%) (95 % CI) 230 of 288 (79.9 %)
(74.9–84.1 %)
139 of 287 (48.4 %)
(42.7–54.2 %)
101 of 287 (35.2 %)
(29.9–40.9 %)
85 of 287 (29.6 %)
(24.6–35.1 %)
126 of 284 (44.4 %)
(38.7–50.2 %)
681 of 1433 (47.5 %)
(45.0–50.1 %)
Urate deposit in contact with bone, n (%) (95 % CI) 169 of 230 (73.5 %)
(67.4–78.8 %)
64 of 139 (46.0 %)
(38.0–54.3 %)
38 of 101 (37.6 %)
(28.8–47.4 %)
27 of 85 (32 %)
(23–42 %)
72 of 126 (57.1 %)
(48.4–65.5 %)
370 of 681 (54.3 %)
(50.6–58.0 %)
Urate deposit on bone surface only, n (%) (95 % CI) 40 of 169 (23.7 %)
(17.9–30.6 %)
39 of 64 (61 %)
(49–72 %)
27 of 38 (71 %)
(52–83 %)
14 of 27 (52 %)
(34–69 %)
23 of 72 (32 %)
(22–43 %)
143 of 370 (38.6 %)
(33.8–43.7 %)a
Urate deposit at site of erosion, n (%) (95 % CI) 129 of 169 (76.3 %)
(69.4–82.1 %)
25 of 64 (39 %)
(28–51 %)
11 of 38 (28.9 %)
(17–5 %)
13 of 27 (48.1 %)
(31–66 %)
49 of 72 (68.1 %)
(57–78 %)
227 of 370 (61.4 %)
(56.3–66.2 %)a
True intra-osseous urate deposit, n (%) (95 % CI) 0 of 169 (0 %)
(0–2 %)
0 of 64 (0 %)
(0–6 %)
0 of 38 (0 %)
(0–9 %)
0 of 27 (0 %)
(0–13 %)
0 of 72 (0 %)
(0–4 %)
0 of 370 (0 %)
(0–1 %)a
  1. a p < 0.0001