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| Factory A | Factory B | Factory C | Total | ||
|---|---|---|---|---|---|
| Time period | AUG 00-JUN 04 | AUG 06-APR 09 | AUG 02-JUN 04 | AUG 06-APR 09 | |
| Males | 1295 (64%) | 911 (64%) | 438 (46%) | 1055 (81%) | 2855 (65%) |
| Females | 731 | 515 | 514 | 245 | 1525 |
| Mean age at enrollment | 36.9 | 36.2 | 31.9 | 36.2 | 35.6 |
| Age range at enrollment | 18–64 | 18–53 | 18–66 | 19–55 | 15–66 |
