Table 5.

Adjusted RRs of inpatient and non-inpatient CDI incidence compared with total antibiotic prescribing

	Inpatients		Non-inpatients
	RR (95% CI)	P value	RR (95% CI)	P value
Total antibiotics (per 1000 items per 1000 STAR-PU)	1.1010 (0.9070–1.3353)	0.329	1.2128 (0.9418–1.5596)	0.13
Financial year
2014–15	1	—	1	—
2015–16	0.8884 (0.7902–0.9987)	0.0479	1.0340 (0.8872–1.2051)	0.668
2016–17	0.7482 (0.6613–0.8462)	<0.001	0.8430 (0.7171–0.9906)	0.037
2017–18	0.7785 (0.6889–0.8795)	<0.001	0.9173 (0.7824–1.0752)	0.287
Health boards (1–7)	—		—	<0.001
Patients aged ≥65 years (per 1% increase)	1.0339 (1.0176–1.0504)	—	1.0152 (0.9941–1.0367)	0.161
Social deprivation score (per 1% increase)	1.0014 (0.9987–1.0041)	0.297	0.9985 (0.9950–1.0020)	0.39
PPI (per 1000 items per 1000 patients)	0.9981 (0.9871–1.0092)	0.734	0.9946 (0.9804 –1.0090)	0.453
COPD (per 1% increase)	1.0532 (0.9712–1.1411)	0.21	1.0608 (0.9536–1.1782)	0.274
Diabetes (per 1% increase)	1.0794 (1.0082–1.1552)	0.027	1.0317 (0.9437–1.1272)	0.488
Hypertension (per 1% increase)	0.9949 (0.9700–1.0203)	0.329	1.0240 (0.9906–1.0582)	0.158

Adjusted models are adjusted for financial year, health board, percentage of patients aged ≥65 years, social deprivation score (percentage of registered patients living in the most deprived areas), PPI (per 1000 items per 1000 registered patients) and percentage of patients with COPD, diabetes and hypertension.