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Percentage distribution of pterygium based on work environment
| Activity environment | Males (n=65) | Females (n=30) | Total (n=95) | |||
|---|---|---|---|---|---|---|
| Number | Percentage | Number | Percentage | Number | Percentage | |
| Outdoor | 57 | 87.7% | 19 | 63.3% | 76 | 80% |
| Indoor | 8 | 12.3% | 11 | 36.7% | 19 | 20% |
