A total of 3974 NHL incident cases was observed (2147 among males, and 1827 among females)
during the 1990–1999 time period. A statistically significant relationship was found at the block group level
between risk for NHL and dioxin exposure, with a relative risk (RR) of 1.120 (95% confidence interval [CI]
1.002 – 1.251) for persons living in highly exposed census blocks compared to those living in slightly
exposed block groups. Population density appeared positively linked both to risk for NHL and dioxin
exposure. Subgroup multivariate analyses per gender yielded a significant RR for females only (RR = 1.178,
95% CI 1.013 – 1.369).