Table 3.

Population characteristics across survey periods at 12 Department of Transportation garages: Data from worker surveys.

	Randomization	Pre-Intervention	Pre-Training	Post-Intervention
	n (%) or Mean (SD)	n (%) or Mean (SD)	n (%) or Mean (SD)	n (%) or Mean (SD)
Male	254 (97)	156 (97)	136 (99)	91 (96)
Racial category
White	194 (74)	113 (69)	97 (70)	67 (70)
Black	34 (13)	19 (11)	19 (14)	14 (15)
American Indian/Alaska Native; Asian; multiple or unknown races	34 (13)	26 (16)	22 (16)	14 (15)
Age (years)	44 (11)	44 (10)	44 (10)	44 (10)
Job tenure (years)	11 (6)	12 (11)	10 (9)	11 (10)
Job Title
Maintainer	227 (87)	135 (85)	110 (84)	77 (84)
Supervisor	36 (13)	24 (15)	21 (16)	15 (16)