Table 4. Features of studied subjects according to the tertiles of urinary sodium excretion and p22-phox C242T genotypes.

Characteristics	Low (<67 mEq/12 h)		Medium (67–111 mEq/12 h)		High (>111 mEq/12 h)
p22-phox(C242T) Genotype	CC	CT+TT	CC	CT+TT	CC	CT+TT
N (%)	184 (43)	247 (57)	178 (42)	248 (58)	194 (44)	247 (56)
Clinical
Age, years	41.7±0.7	43.1±0.7	43.9±0.8	42.7±0.6	44.8±0.8	43.9±0.7
Gender (Male/Female)	75/109	93/152	97/81	97/153	113/81	154/93
Systolic blood pressure, mmHg	121.9±1.5	121.5±1.3	124.7±1.4	121.2±1.0	125.5±1.2	129.1±1.3*
Diastolic blood pressure, mmHg	80.4±1.0	79.1±0.8	82.0±0.9	80.6±0.7	83.9±0.9	86.9±0.9*
Body mass index, kg/m2	25.1±0.4	25.2±0.3	25.7±0.3	24.9±0.3	26.2±0.3	27.1±0.3
Smoking, n (%)	48 (26)	51 (21)	43 (24)	51 (20)	44 (23)	69 (28)
Hypertension, n (%)	53 (29)	65 (26)	61 (34)	73 (29)	80 (41)	124 (50)
Diabetes mellitus, n (%)	33 (18)	34 (14)	23 (13)	41 (16)	28 (14)	54 (22)
Race (Caucasian-descent), n (%)	84 (46)	105 (43)	67 (38)	108 (43)	85 (44)	89 (36)
Serum analysis
Glycemia, mg/dL	100.6±2.2	99.5±1.2	100.9±1.8	101.9±1.7	102.4±2.1	104.8±2.0
Uric acid, mg/dL	4.5±0.1	4.7±0.1	4.7±0.1	4.4±0.1	5.2±0.4	5.0±0.1
Creatinine, mg/dL	0.97±0.16	0.93±0.01	0.96±0.01	0.94±0.01	0.98±0.01	1.00±0.01
Triglycerides, mg/dL	123.6±7.1	113.8±5.0	123.1±6.7	120.6±5.7	139.6±7.1	148.0±7.1
HDL-cholesterol, mg/dL	54.7±2.8	50.1±1.8	49.6±2.1	49.4±1.7	52.6±3.1	50.7±2.2
LDL-cholesterol, mg/dL	138.2±2.9	141.5±2.5	138.5±3.2	140.1±2.5	140.2±2.9	137.4±2.3
12 h urinary analysis
Sodium, mEq	43.4±1.1	44.6±0.9	85.7±0.9	87.7±0.8	156.7±3.2	161.5±3.3
Potassium, mEq	16.2±0.7	16.6±0.7	20.5±0.8	22.0±0.8	32.3±1.5	29.6±0.9

Legend. HDL – high-density-lipoprotein; LDL – low-density-lipoprotein;

^*p<0.05 in comparison with CC genotype.