Table 2

Risk of outcome events among vehicle mechanics versus comparators

Outcomes	Events	Number at risk	Person-years at risk	Cumulative incidence*	Rate per 1 00 000 years	Crude HR	Adjusted HR
Incidence (morbidity)
Mesothelioma or pleural cancer
Vehicle mechanics	47	138 285	2 751 769	0.07%	1.71	0.71 (0.53–0.96)	0.74 (0.55–0.99)
Comparators	628	1 383 258	26 303 492	0.09%	2.39	Ref	Ref
Cancer of the lung and bronchus
Vehicle mechanics	1815	138 253	2 749 063	2.71%	66.02	1.05 (1.00–1.10)	1.09 (1.03–1.14)
Comparators	16 530	1 382 889	26 280 353	2.60%	62.90	Ref	Ref
Asbestosis
Vehicle mechanics	47	138 276	2 751 423	0.07%	1.71	1.43 (1.05–1.94)	1.50 (1.10–2.03)
Comparators	313	1 383 177	26 301 322	0.04%	1.19	Ref	Ref
Lung disease due to other external agents
Vehicle mechanics	474	138 226	2 748 852	0.68%	17.24	1.01 (0.92–1.11)	1.03 (0.94–1.14)
Comparators	4450	1 382 725	26 279 085	0.68%	16.93	Ref	Ref
COPD
Vehicle mechanics	4581	137 648	2 716 350	6.86%	168.65	0.99 (0.96–1.02)	1.02 (0.99–1.05)
Comparators	44 023	1 377 863	25 973 444	7.03%	169.49	Ref	Ref
Mortality
Death due to pleural cancer or mesothelioma
Vehicle mechanics	48	138 559	2 646 186	0.06%	1.81	0.83 (0.62–1.12)	0.86 (0.64–1.15)
Comparators	553	1 385 590	25 427 487	0.07%	2.17	Ref	Ref
Death due to cancer of the lung or bronchus
Vehicle mechanics	1435	138 559	2 646 186	2.08%	54.23	1.02 (0.96–1.07)	1.06 (1.01–1.12)
Comparators	13 515	1 385 590	25 427 487	1.99%	53.15	Ref	Ref
Death due to asbestosis
Vehicle mechanics	19	138 559	2 646 186	0.03%	0.72	1.68 (1.03–2.74)	1.79 (1.10–2.92)
Comparators	108	1 385 590	25 427 487	0.02%	0.42	Ref	Ref
Death from lung disease due to external agents
Vehicle mechanics	102	138 559	2 646 186	0.13%	3.85	1.01 (0.83–1.24)	1.06 (0.86–1.30)
Comparators	964	1 385 590	25 427 487	0.15%	3.79	Ref	Ref
All-cause death
Vehicle mechanics	17 416	138 559	2 877 666	22.6%	605.21	0.96 (0.95–0.98)	1.00 (0.98–1.01)
Comparators	173 298	1 385 590	27 564 312	23.6%	628.70	Ref	Ref

*Cumulative incidence was estimated using a cumulative incidence function that took into account the competing risk of death.
COPD, chronic obstructive pulmonary disease.