Table 2.

Injury Rates of US Aluminum Smelter Employees, by Sex, 1996–2005^a

	Rate/100 Person-Years	Odds Ratio (Female vs. Male)b	95% Confidence Interval
All injuries (n = 11,867 injuries)
Female	31.89	1.365	1.290, 1.445
Male	19.43
Total recordable (n = 4,527 injuries)
Female	13.15	1.370	1.254, 1.498
Male	7.34
Lost work days (n = 267 injuries)
Female	1.30	1.116	0.796, 1.565
Male	0.40

^aBecause age did not have a continuous effect, age categories (≤30, >30–40, >40–50, >50–60, >60 years) were used for adjustment. Tenure categories: <20, 20–30, >30 years.

^bAdjusted by standard job, age category, and tenure category.