Respiratory	IRR	Lower bound	Upper bound	P values	Injuries	IRR	Lower bound	Upper bound	P values
Windows and doors	0.61	0.49	0.76	0.0000	Windows and doors	0.56	0.40	0.77	0.0004
Wall insulation	0.76	0.62	0.92	0.0055	Wall insulation	0.76	0.57	1.02	0.0700
Loft insulation	1.18	0.95	1.48	0.1376	Loft insulation	1.02	0.73	1.43	0.8867
Heating systems	0.85	0.71	1.03	0.0926	Heating systems	1.01	0.77	1.32	0.9663
Kitchens	1.17	0.86	1.59	0.3257	Kitchens	0.75	0.48	1.17	0.2091
Bathrooms	0.89	0.70	1.13	0.3215	Bathrooms	1.18	0.83	1.66	0.3544
Electrical systems	0.43	0.33	0.57	0.0000	Electrical systems	0.56	0.37	0.85	0.0071
Garden paths	0.62	0.49	0.78	0.0000	Garden paths	0.69	0.49	0.97	0.0352