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Table 1 Demographic and baseline characteristics (n = 27)

From: Dual-energy CT in gout patients: Do all colour-coded lesions actually represent monosodium urate crystals?

  Gout patients (MSU-positive) (n = 23) Non-gout patients (MSU-negative) (n = 4)
Age, years, mean (SD), [range] 62.6 (12.8) [39–85] 63.5 (7.3) [55–71]
Male sex, no. (%) 22 (96%) 3 (75%)
Calcium pyrophosphate-positive (joint puncture) patients, no. (%) 2 (9%) 3 (75%)
Fulfilment of the ACR/EULAR 2015 gout classification criteria at the time of inclusion or 1 year after inclusion*, no. (%) 23/23 (100%) 0/4 (0%)
Self-reported disease duration, months, median (IQR), [range] 108 (36; 180) [3–456] 84 (39; 138) [6–180]
No. of joint attacks within 12 weeks, median (IQR), [range] 1 (1; 4) [0–12] 2 (1; 4) [0–4]
Self-reported region of pain/joint attacks (ever) (pct.):
 Fore- and midfoot 22 (96%) 4 (100%)
 Ankle region (incl. Achilles tendon) 8 (35%) 1 (25%)
 Knee 16 (70%) 1 (25%)
 Finger and/or wrist 11 (48%) 4 (100%)
Visual analogue scale, pain, 0–100, median (IQR), [range] 35 (10; 60) [5–90] 38 (25; 60) [20–75]
No. of tender joints (0–60), median (IQR), [range] 5 (2; 10), [0–26] 7 (3; 11), [2–11]
No. of swollen joints (0–60), median (IQR), [range] 1 (0; 5), [0–10] 2 (1; 3), [0–3]
P-urate (mmol/L), mean (SD), [range] 0.50 (0.11) [0.32–0.70] 0.40 (0.08) [0.32–0.50]
(mg/dL), mean (SD), [range] 8.4 (1.8) [5.4–11.8] 6.7 (1.3) [5.4–8.4]
Number of patients with colour-coded DECT lesions (%) 21/23 (91%) 1/4 (25%)
Colour-coded DECT lesions (n) 3918 115
Colour-coded DECT lesions pr. patient, median (IQR), [range] 47 (10; 226), [3–1308]
  1. *All gout patients were MSU-positive and therefore also fulfilled the ACR/EULAR classification criteria for gout as MSU crystal identification is a sufficient criterion [2]. MSU-negative patients were evaluated according to the remaining clinical and laboratory criteria but excluding the imaging criteria [2]. DECT, dual-energy CT; ACR/EULAR, American College of Rheumatology/European League Against Rheumatism; SD, standard deviation; IQR, interquartile range; MSU, monosodium urate crystals; P-urate, plasma urate