Table 1.
Patient Characteristics at Baseline
| Patient Characteristics | Patients (n = 405) |
|---|---|
| Age (yr), mean (SD) | 57.7 (13.4) |
| <50 | 95 (23%) |
| 50–59 | 100 (25%) |
| 60–69 | 145 (36%) |
| ≥70 | 65 (16%) |
| Sex | |
| Female | 328 (81%) |
| Male | 77 (19%) |
| Race | |
| White | 292 (72%) |
| Black | 46 (11%) |
| Other | 67 (17%) |
| Ethnicity | |
| Hispanic or Latino | 62 (15%) |
| Other | 343 (85%) |
| Cigarette smoking | |
| Never | 272 (67%) |
| Former | 112 (28%) |
| Current | 21 (5%) |
| Diabetes | 48 (12%) |
| Hypertension | 114 (28%) |
| Sjögren's syndrome | 38 (10%) |
| Thyroid dysfunction | 80 (20%) |
| Rheumatoid arthritis | 39 (10%) |
| Ever worn contact lenses | 152 (38%) |
| OSDI total score (lower is better), mean (SD) | 44.2 (14.2) |
| Ocular Characteristics | Eyes (N = 794) |
| Corneal staining score (lower is better), mean (SD) | 3.5 (2.7) |
| Conjunctival staining score (lower is better), mean (SD) | 2.9 (1.4) |
| Tearfilm tear break-up time (s) (higher is better), mean (SD) | 3.1 (1.6) |
| Schirmer test (mm) (higher is better), mean (SD) | 10.4 (7.1) |
| Keratography tear break-up time (higher is better), mean (SD) | 8.3 (5.7) |
| Keratography bulbar redness score (lower is better), mean (SD) | 1.15 (0.48) |
| Keratography tear meniscus height (higher is better), mean (SD) | 0.38 (0.16) |