Table 2.

Lifetime pesticide-use days, intensity-weighted lifetime pesticide-use days, and RTL.

Pesticide (class)	Pesticide use (continous)	Lifetime days			Lifetime intensity-weighted days
		n	RTL mean ± SD	ptrenda(β ± SE)	n	RTL mean ± SD	ptrenda(β ± SE)
Herbicides
Alachlor (chloroacetanilde)	No use	466	1.24 ± 0.41		466	1.24 ± 0.41
	Low	225	1.18 ± 0.31		221	1.14 ± 0.28
	Medium	215	1.18 ± 0.32		219	1.19 ± 0.36
	High	219	1.16 ± 0.33	0.002 (–0.011 ± 0.010)	219	1.18 ± 0.32	0.005 (–0.007 ± 0.002)
Metolachlor (acetamide)	No use	622	1.23 ± 0.38		622	1.23 ± 0.38
	Low	223	1.17 ± 0.31		165	1.18 ± 0.32
	Medium	112	1.18 ± 0.31		164	1.18 ± 0.33
	High	157	1.16 ± 0.37	0.01 (–0.013 ± 0.004)	163	1.16 ± 0.34	0.01 (–0.006 ± 0.002)
Trifluralin (dinitroaniline)	No use	515	1.23 ± 0.36		515	1.23 ± 0.36
	Low	249	1.20 ± 0.39		200	1.17 ± 0.42
	Medium	191	1.17 ± 0.33		199	1.19 ± 0.33
	High	159	1.16 ± 0.33	0.05 (–0.008 ± 0.004)	199	1.18 ± 0.31	0.06 (–0.004 ± 0.002)
2,4-D (phenoxyacid)	No use	194	1.27 ± 0.48		194	1.27 ± 0.48
	Low	366	1.21 ± 0.36		334	1.21 ± 0.37
	Medium	320	1.21 ± 0.31		338	1.18 ± 0.32
	High	318	1.16 ± 0.32	0.004 (–0.012 ± 0.004)	330	1.18 ± 0.31	0.02 (–0.006 ± 0.002)
Insecticide
DDT (organochlorine)	No use	428	1.21 ± 0.34		428	1.21 ± 0.34
	Low	153	1.13 ± 0.33		126	1.10 ± 0.33
	Medium	97	1.13 ± 0.32		124	1.15 ± 0.30
	High	121	1.16 ± 0.30	0.08 (–002 ± 0.006)	121	1.18 ± 0.31	0.03 (–0.006 ± 0.003)
Permethrin (poultry/livestock) (pyrethroid)	No use	1,021	1.21 ± 0.37		1,021	1.21 ± 0.37
	Low	36	1.17 ± 0.27		34	1.16 ± 0.26
	Medium	40	1.16 ± 0.28		35	1.12 ± 0.29
	High	28	1.10 ± 0.26	0.02 (–0.018 ± 0.008)	33	1.14 ± 0.26	0.02 (–0.010 ± 0.004)
Toxaphene (organochlorine mixture)	No use	679	1.18 ± 0.33		679	1.18 ± 0.33
	Low	60	1.13 ± 0.39		43	1.08 ± 0.39
	Medium	31	1.15 ± 0.28		43	1.22 ± 0.34
	High	37	1.14 ± 0.27	0.04 (–0.017 ± 0.009)	42	1.11 ± 0.25	0.05 (–0.008 ± 0.004)
ap-Value of regression coefficient for ln-RTL (continuous) regressed on ln-transformed lifetime days of pesti­cide use (continuous) or ln-transformed lifetime intensity weighted days of pesti­cide use (continuous), adjusted for age at buccal collection (continuous), state (Iowa vs. North Carolina), license types (private vs. commercial), regular use of chewing tobaccofor ≥ 6 months (yes vs. no), total pesti­cide exposure days (continuous). RTL mean is the arithmetic mean for the stratum-specific RTL by pesti­cide-use group.