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Table 1 Descriptive characteristics of sample (N = 8060)

From: Evaluating vitamin C-related gene-environment and metabolite-environment interaction effects on intraocular pressure in the Canadian Longitudinal Study on Aging

Variable

N (%) or Mean (SD)

Intraocular Pressure

16.32 (3.95)

Self-reported Glaucoma

357 (4.4%)

IOP-lowering Treatment

166 (2.1%)

Female Sex

4120 (51.1%)

Age, Years

63 (10.1)

Low education

Less than a Bachelor’s

1678 (20.8%)

Bachelor’s Degree

1855 (23.0%)

University Degree above Bachelor’s

4527 (56.2%)

Smoking Status

Never Smoker

3728 (46.3%)

Former Smoker

3599 (44.7%)

Current Smoker

733 (9.1%)

Alcohol Frequency

Never

147 (1.8%)

Occasionally

3141 (39.0%)

Weekly

3442 (42.7%)

Daily

1330 (16.5%)

Fruit Consumption, # servings per day

1.81 (1.14)

Vegetable Consumption, # servings per day

1.91 (1.07)

Province

Alberta

801 (9.9%)

British Columbia

1650 (20.5%)

Manitoba

837 (10.4%)

Newfoundland and Labrador

585 (7.3%)

Nova Scotia

834 (10.3%)

Ontario

1758 (21.8%)

Quebec

1595 (19.8%)

Income

<$20 000

385 (4.8%)

$20 000-$50 000

1718 (21.3%)

$50 000-$100 000

2680 (33.3%)

$100 000-$150 000

1546 (19.2%)

>$150 000

1256 (15.6%)

Missing/Refused/Don’t Know

475 (5.9%)

Hypertension

4530 (56.2%)

Diastolic Blood Pressure (mmHg)

74.23 (9.87)

Systolic Blood Pressure (mmHg)

121.61 (16.72)

Diabetes

1368 (17.0%)

Daily Caloric Intake

1516.5 (466.3)

BMI

Underweight

219 (2.7%)

Normal Weight

2165 (26.9%)

Overweight

3289 (40.8%)

Obese

2387 (29.6%)

rs4680

AA

2143 (26.6%)

AG

4036 (50.1%)

GG

1871 (23.2%)

rs8050812

CC

4141 (53.5%)

CT

3033 (39.2%)

TT

570 (7.4%)

rs165879

GG

7212 (91.3%)

GA

664 (8.4%)

AA

19 (0.2%)

rs144009214

CC

7744 (96.6%)

CT

272 (3.4%)

TT

3 (0.0%)

rs61484427

(TCT)2

5622 (72.0%)

(TCT)2/delTCT

2007 (25.7%)

delTCT/delTCT

179 (2.3%)

rs12414734

GG

3043 (38.5%)

GA

3776 (47.7%)

AA

1093 (13.8%)