Table 2.
Prevalence of pterygium by gender
| Pterygium | Men (95% CI) | Women (95% CI) | Total (95% CI) |
|---|---|---|---|
| Any pterygium* | 3.9% (2.8–5.4) | 4.7% (3.6–5.9) | 4.4% (3.6–5.3) |
| Bilateral pterygium† | 1.5% (0.8–2.5) | 1.6% (1.0–2.4) | 1.6% (1.1–2.1) |
| Age | |||
| <50 | 2.6% (0.3–9.2) | 3.2% (0.7–9.0) | 2.9% (1.0–6.7) |
| 50–59 | 1.7% (0.3–4.8) | 4.5% (2.3–8.0) | 3.3% (1.8–5.5) |
| 60–69 | 4.4% (2.7–6.8) | 3.4% (2.1–5.1) | 3.8% (2.8–5.1) |
| 70–74 | 5.1% (2.7–8.7) | 7.3% (4.9–10.3) | 6.5% (4.6–8.7) |
| Outdoor job history | |||
| + | 5.2% (2.5–9.4) | 6.0% (3.7–9.2) | 5.7% (3.9–8.1) |
| − | 3.6% (2.4–5.2) | 4.2% (3.1–5.7) | 4.0% (3.1–5.0) |
| Smoking history | |||
| + | 3.3% (1.5–6.1) | 7.4% (2.1–17.9) | 4.0% (2.1–6.7) |
| − | 4.2% (2.8–6.0) | 4.6% (3.5–5.8) | 4.4% (3.6–5.4) |
CI = confidence interval.
*
Any pterygium is defined as pterygium in either eye or both eyes.
†
Bilateral pterygium is defined as pterygium in both eyes.