From: Issues of methods and interpretation in the National Cancer Institute formaldehyde cohort study
Formaldehyde exposure status | ||||||
---|---|---|---|---|---|---|
Non-exposed | Exposed | |||||
NCI update | No. deaths | SMR | 95% CI | No. deaths | SMR | 95% CI |
All causes of death (ICD8: 001-999) | ||||||
NCI 1994 updatea. | 1,991 | 0.85* | 0.81-0.89 | 6,495 | 0.96* | 0.94-0.98 |
NCI 1994 update (corrected)b. | 2,169 | 0.89* | 0.86-0.93 | 7,312 | 1.02 | 0.99-1.04 |
NCI 2004 updatec. | 2,605 | 0.90* | 0.87-0.94 | 11,346 | 1.03* | 1.01-1.05 |
NPC deaths (ICD8: 147)d. | ||||||
NCI 1994 updatea. | 2 | 1.56 | 0.39-6.23 | 8 | 2.10 | 0.91-4.14 |
NCI 1994 update (corrected)b. | 2 | 1.57 | 0.40-6.28 | 8 | 2.13 | 0.92-4.19 |
NCI 2004 updatec. | 2 | 1.45 | 0.17-5.25 | 9 | 1.84 | 0.84-3.49 |