Table 2.

Characteristics of Study Population at the Incidence Phase of the Thessaloniki Eye Study by Salt Intake Status (n=1,076)

Continuous Variables
Characteristic	Mean (Standard Deviation) in Participants with “Never” Frequency of Salt Use; n=347	Mean (Standard Deviation) in Participants with “Rare/Occasional” Frequency of Salt Use; n=579	Mean (Standard Deviation) in Participants with “Often” Frequency of Salt use; n=150	P-Value
Age (years)	80.9 (4.7)	80.3 (4.3)	80.4 (4.3)	0.1
Central corneal thickness (μm)	543.2 (36.1)	544.6 (34.1)	548.1 (39.7)	0.4
Intraocular pressure (mmHg)	14.6 (3.4)	14.7 (3.5)	14.9 (4.0)	0.6
Systolic blood pressure (mmHg)	132.2 (17.6)	130.3 (18.8)	130.3 (15.4)	0.3
Diastolic blood pressure (mmHg)	71.6 (11.0)	71.2 (12.2)	69.9 (10.6)	0.3
Categorical Variables
Characteristic	N (%) in Participants with “Never” Frequency of Salt Use; n=347	N (%) in Participants with “Rare/Occasional” Frequency of Salt Use; n=579	N (%) in Participants with “Often” Frequency of Salt use; n=150	P-Value
Gender
Male	169 (48.7)	307 (53.0)	82 (54.7)
Female	178 (51.3)	272 (47.0)	68 (45.3)	0.3
Marital Status
Never Married	4 (1.2)	14 (2.4)	5 (3.3)
Married	207 (59.7)	343 (59.2)	92 (61.3)
Divorced/Separated/Widowed	136 (39.2)	222 (38.3)	53 (35.3)	0.5
Antihypertensive Use	248 (71.5)	421 (72.7)	115 (76.7)	0.5
Cardiovascular Disease	121 (35.0)	232 (40.1)	61 (40.7)	0.3
Migraines	13 (3.8)	39 (6.7)	14 (9.3)	0.04
Diabetes	65 (18.7)	131 (22.6)	45 (30.0)	0.02
History of Cataract Surgery	144 (41.5)	236 (40.8)	64 (42.7)	0.9
Steroid Use	17 (4.9)	37 (6.4)	7 (4.7)	0.6
Active Smoker	147 (42.4)	297 (51.3)	81 (54.0)	0.01