Table 2.

Dispensing, use and waste of MDIs prescribed in hospital

	Salbutamol		Ipratropium		Ciclesonide		Aggregate of all 3 MDIs
	Per patient	Aggregate (n = 100)	Per patient	Aggregate (n = 100)	Per patient	Aggregate (n = 100)	Aggregate (n = 100)
MDI prescriptions	1	100	0.5	50	0.07	7	NA
No. of MDIs dispensed	1 (1–7)	191	2 (1–7)	116	1 (1–2)	8	315
No. of MDIs with no use	1 (0–3)	66	0 (0–6)	29	0 (0–1)	1	96
No.of actuations dispensed	200 (200–1400)	38,200	400 (200–1400)	23,200	30 (30–60)	240	61,440
No. of actuations used	5 (0–232)	2656	26 (0–244)	1947	8 (0–35)	64	4667
No. of actuations wasted	200 (44–1322)	35,544	372 (44–1394)	21,053	25 (20–30)	176	56,773
No. of actuations used/ dispensed	2656/38,200 (7%)		1947/23,200 (8%)		64/240 (27%)		4667/61,440 (8%)
Estimated annual MDIs dispensed from purchasing data	9240		4931		819		14,990
Estimated annual carbon cost of wasted actuations (tCO2e)	242.3		66.2		7.3		315.8

Aggregate refers to the entire study cohort of 100 patients. Data presented as actual counts, median (range) or proportion (percentage). MDI, metered-dose inhaler; NA, not applicable; tCO2e, tons of carbon dioxide equivalents.