Respiratory	IRR	Lower bound	Upper bound	P values	Injuries	IRR	Lower bound	Upper bound	P values
Windows and doors	0.69	0.57	0.85	0.0004	Windows and doors	0.64	0.47	0.86	0.0035
Wall insulation	0.71	0.58	0.86	0.0005	Wall insulation	0.86	0.63	1.16	0.3144
Loft insulation	1.08	0.89	1.31	0.4471	Loft insulation	0.91	0.68	1.22	0.5456
Heating systems	0.92	0.70	1.20	0.5341	Heating systems	1.11	0.71	1.75	0.6411
Kitchens	0.97	0.70	1.34	0.8394	Kitchens	1.04	0.61	1.76	0.8890
Bathrooms	1.01	0.77	1.33	0.9570	Bathrooms	0.66	0.42	1.04	0.0742
Electrical systems	0.51	0.39	0.67	0.0000	Electrical systems	0.76	0.50	1.15	0.1964
Garden paths	0.76	0.62	0.91	0.0036	Garden paths	0.62	0.46	0.82	0.0010