Table 1.
Characteristics of Subjects With One Versus Multiple Visits at Baseline Midlife Assessment in the Reykjavik Study
| Characteristics at First BP Measurement, M (SD) | One Visit | Multiple Visits | P Valuea |
|---|---|---|---|
| n=459 | n=477 | ||
| Age | 49.4 (6.4) | 46.2 (7.9) | <0.0001 |
| Men, % (n) | 43.1 (198) | 53.2 (254) | 0.04 |
| Height, cm | 170.4 (8.6) | 171.9 (9.1) | 0.26 |
| Weight, kg | 74.1 (12.6) | 75.3 (13.1) | 0.80 |
| BMI, kg/m2 | 25.4 (3.5) | 25.4 (3.4) | 0.41 |
| Tobacco use, % (n) | |||
| Ever smoker | 58.8 (270) | 14.3 (68) | <0.0001 |
| Current smoker | 35.1 (161) | 8.8 (42) | <0.0001 |
| Antihypertensive medication, % (n) | 7.6 (35) | 1.0 (5) | 0.0003 |
| Diabetes mellitus, % (n) | 1.7 (8) | 0.2 (1) | 0.05 |
| Blood pressure, mm Hgb | |||
| Systolic | 133.8 (17.2) | 134.1 (16.8) | 0.25 |
| Diastolic | 84.5 (10.2) | 84.9 (10.1) | 0.38 |
| Blood sample | |||
| Cholesterol, mmol/L | 6.34 (1.14) | 6.29 (1.06) | 0.57 |
| Triglycerides, mmol/Lc | 1.18 (0.69) | 1.16 (0.63) | 0.84 |
| Fasting glucose, mmol/L | 80.3 (10.9) | 80.5 (11.2) | 0.54 |
| Creatinine, μmol/L | 85.4 (13.8) | 85.5 (14.7) | 0.08 |
BMI indicates body mass index; BP, blood pressure; M (SD), mean (standard deviation).
a
Logistic regression to compare subjects with one or more than one visit, adjusted for age and sex.
b
Adjusted for antihypertensive medications.
c
Adjusted for cholesterol.