Appendix 3.

Comparison of Workers Included and Excluded from Analyses

Variable	Analysis N	Included subjects (6,215)	Excluded subjects (2,753)
Female sex (%)	8,968	19·4	21·4
African American (%)	8,938	37·2	30·0
Divorced/Separated/Widowed (%)	8,943	23·6	21·9
Financial worries (%)	8,910	54·5	53·8
Other oil industry experience (%)	8,949	16·6	17·4
Max estimated TH exposure (%)
≤ 0·29 ppm	8,929	11·2	23·0
0·3 to 0·99 ppm		39·6	30·3
1·00 to 2·99 ppm		33·8	29·9
≥ 3·0 ppm		15·5	13·6
Age: Mean (SD)	8,966	42·8 (12·8)	44·1 (13·0)
Duration of spill work: Mean (SD)	8,968	146·0 (142·4)	144·3 (150·3)