| Subjects with gout(n = 164) | |
| Age: years, mean (SD) | 63.4 (11.2) |
| Gender: male (%) | 133 (81) |
| Height: cm, mean (SD) | 172 (8) |
| Weight: kg, mean (SD) | 83 (15) |
| BMI: kg/m2, mean (SD) | 27.8 (4.0) |
| Age at first attack (years), mean (SD) | 50.5 (13.7) |
| Disease duration (years), median (range) | 10 (0–50) |
| Tophus | |
| Total (%) | 10 (6) |
| Definite (%) | 5 (3) |
| Possible (%) | 5 (3) |
| Fulfil American Rheumatism Association preliminary criteria for primary gout (%) | 150 (92) |
| Serum urate μmol/l, mean (SD) (normal range 100–400) | 399 (107) |
| Serum creatinine μmol/l, median (range) (normal range 60–120) | 94 (63–180) |
| GFR ml/min, median (range) | 78 (19–170) |
| GFR <60 ml/min (%) | 39 (24) |
| Medication use: | |
| Taken diuretics prior to first attack (%) | 25 (15) |
| Low-dose aspirin (%) | 51 (31) |
| Allopurinol (%) | 44 (30) |
| Uricosuric agents (%) | 0 |
| Possible secondary gout (ie, GFR <60 ml/min or taking diuretics prior to first attack) | 50 (30) |
SD, standard deviation; BMI, body mass index; GFR, glomerular filtration rate.