Table 1.

Characteristics of subjects

Characteristic	Value (n = 13)
Sex (F/M)	3/10
Age (years)
Overall	56.1 (40–75)
Females	64.7 (63–66)
Males	53.5 (40–75)
No. of subjects with tophi	11
No. of subjects on medication
Allopurinol	6
Uricosurics	0
Colchicine	3
Prednisone (for gout)	8
Serum uric acid (mg/dl)
Overall	10.1 ± 2.3 (6.9–14.7)
On allopurinol	10.0 ± 2.4 (6.9–14.7)
Not on allopurinol	10.3 ± 2.3 (7.1–13.8)
Serum creatinine (mg/dl)	1.6 ± 0.5 (0.9–2.5)
No. of subjects with co-morbidity
Osteoarthritis	3
Hypertension	7
Heart disease	2
Diabetes	1

Where errors are shown, results are means ± SD; numbers in parentheses are ranges. Serum uric acid and serum creatinine were measured before allopurinol washout.