Low salivary uric acid levels are independently associated with periodontitis

Table 2 Comparisons between subjects with and without periodontitis, n (%)/median (25^th-75^th percentiles)

	Subjects without periodontitis (n = 60)	Subjects with periodontitis (n = 61)	P value
Age (years)	41 (34-49)	60 (52-68)	< 0.001
Salivary uric acid (nmol/mL)	112 (82-176)	89 (54-119)	0.002
Body mass index (kg/m²)	24.8 (22.9-26.7)	24.8 (22.6-28.4)	0.81
Sex female	40 (66.7)	38 (62.3)	0.71
Arterial hypertension	3 (5.0)	19 (31.1)	0.001
Diabetes mellitus	0	5 (8.2)	0.06
Obesity	7 (11.9)	9 (14.8)	0.79
Never smoker	47 (78.3)	26 (42.6)	< 0.001
Coffee	51 (85.0)	54 (88.5)	0.60
Tea	5 (8.3)	3 (4.9)	0.49
Alcohol	27 (45.0)	31 (50.8)	0.59
Rheumatoid arthritis	1 (1.7)	4 (6.6)	0.37
Immunosupressive therapy	1 (1.7)	3 (4.9)	0.62
Radiotherapy	0	3 (4.9)	0.24
Metrotexate	1 (1.7)	0	0.50