A probabilistic approach for economic evaluation of occupational health and safety interventions: a case study of silica exposure reduction interventions in the construction sector

Table 2 Sensitivity Analysis of Interventions for Different Numbers of Silica-Exposed Workers and Different Levels of Exposure

Primary silica exposure	Baseline	Low Exposure (< 0.0125 mg/m³)		Medium Exposure (0.0125–0.025 mg/m³)		High Exposure (> 0.025 mg/m³)
Silica-exposed workers^a		Lower bound	Upper bound	Lower bound	Upper bound	Lower bound	Upper bound
Silica-exposed workers^a	91	46	118	46	118	46	118
No Intervention
Expected LC cases^b	110	60	111	80	140	95	180
Total LC costs^c	$189 M	$103 M	$191 M	$138 M	$241 M	$164 M	$310 M
WM-LEV-PPE
LC cases averted^d	107	60	111	79	138	84	162
Total LC costs averted^e	$185 M	$103 M	$191 M	$136 M	$238 M	$145 M	$280 M
Total intervention costs^f	$151 M	$99 M	$173 M	$99 M	$173 M	$99 M	$173 M
Net benefit^g	$46 M	$4 M	$19 M	$37 M	$65 M	$46 M	$107 M
Net benefit change (%)	–	10%	41%	80%	142%	100%	233%
WM-LEV
LC cases averted^d	95	60	111	71	124	46	100
Total LC costs averted^e	$164 M	$103 M	$191 M	$122 M	$214 M	$79 M	$172 M
Total intervention costs^f	$63 M	$43 M	$71 M	$43 M	$71 M	$43 M	$71 M
Net benefit^g	$107 M	$60 M	$120 M	$79 M	$143 M	$36 M	$101 M
Net benefit change (%)	–	57%	113%	74%	134%	34%	95%
PPE
LC cases averted^d	96	59	109	73	129	57	113
Total LC costs averted^e	$166 M	$101 M	$187 M	$126 M	$222 M	$97 M	$195 M
Total intervention costs^f	$81 M	$56 M	$101 M	$56 M	$101 M	$56 M	$101 M
Net benefit^g	$85 M	$45 M	$86 M	$70 M	$120 M	$42 M	$94 M
Net benefit change (%)	–	53%	101%	83%	141%	49%	110%

Note. ^anumber of the silica-exposed workers in the construction sector in thousand, ^bexpected occupational lung cancer cases,^ctotal cost of occupational lung cancer cases with no intervention, ^dexpected occupational lung cancer cases averted after implementation of an intervention, ^etotal cost of lung cancer cases averted, ^fcost of implementing a silica exposure reduction intervention, ^gdifference between cost of lung cancer cases averted and cost of intervention. All table monetary values are in 2017 Canadian dollars

ISSN: 1471-2458