Bulzacchelli, MT (2007) Effects of the Occupational Safety and Health Administration's control of hazardous energy (lockout/tagout) standard on rates of machinery‐related fatal occupational injury.
Country	US
Aim	To evaluate the impact of the United States' federal Occupational Safety and Health Administration's control of hazardous energy (lockout/tagout) standard on rates of machinery‐related fatal occupational injury.
Target population	Occupation: Mixed: industrial and construction/mixed
	Industry: All or mixed industries
	Setting: 888 All or mixed setting
	Firm size: Mixed firm size
Study design	ITS with comparison conditions: 4. Serial measures with external and internal control
	Unit of analysis: Group/organizational level
	Sample size: 3323 fatal machine‐related injuries in manufacturing, used estimates of nationwide US industry workers as denominator
Type of intervention	2.2.1 Legislative changes
Evaluation design	Duration of intervention: Standard went into effect and was permanent
	Duration of follow‐up: 4 = Long‐term (>36 months)
	Type of outcome measure: Injury
Study quality	High quality