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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