Appendix Table 4.

Synthesis of studies found using the second search strategy focusing on injuries.

Paper	Study period	Heat index	Data source	Association measures	Study design	Lag time	Heat wave definition
Adam-Poupart et al (2)	2003-2010	Maximum daily outdoor temperature	Workers' Compensation Board	IRR per 1°C increase	Incidence	0-1-2; moving average (0-1; 0-1-2	N.A.
Bonauto et al (13)	May 2010-March 2011	WBGTmax	British Petroleum Workers' compensation database	IRR per 1°C above - WBGTmax 20	Incidence	1	N.A.
Fortune et al (33)	2002-2012	Maximum daily temperature and minimum daily temperature (minimum temperature during the night before the day of injury )	Workers' compensation claims database	OR per 1°C increase in temperature measure	Case-crossover	0	N.A.
Fortune et al (32)	1998-2003	Apparent temperature (AT AT max, AT24 and AT day were assessed	Hospital discharge data	Proportions comparison	Ecological	0 1	N.A.
Fuhrmann et al (34)	200-2013	Daily maximum and minimum temperatures	Workers' compensation claims database	Proportions comparison	Case-crossover	N.A.	≥3 days of max temp in excess of 35°C
Garzon-Villalba et al (37)	2000-2012	Maximum daily humidex exposures	Workers' compensation claims database	OR per category of humidex index	Case-crossover	0	N.A.
Gubernot et al (38)	2005	Experiences of heat stress derived from survey question	Questionnaire survey	OR	Cohort study	N.A.	N.A.
Harduar-Morano et al (42)	2001-2010	Daily maximum and minimum temperatures	Workers' compensation claims database	IRR	Time series	N.A.	≥3 days of max temp in excess of 35°C; ≥5 days of max temp in excess of 35°C OR ≥3 days of max temp in excess of40°C
Harduar-Morano et al (44)	2001-2010	Daily maximum temperature	Workers' compensation claims database	IRR per 1°C between 14.2°C and 37.7°C	Ecological	0	N.A.