Table 2. Factors associated with consumption of antibiotics by prescription in elderly persons aged ≥65 years in Spain.

Spanish National Health Survey 2003–2006, 2012 and European Health Interview Survey 2009 and 2014 for Spain.

		Male	Female
		AOR, 95%CI	AOR, 95%CI
Age	65–74	1	1
	75–84	1.01(0.80–1.26)	0.78(0.65–0.94)
	≥ 85	0.81(0.57–1.17)	0.88(0.67–1.14)
Educational level	No formal education	1	1
	Primary education	1.11(0.87–1.42)	0.89(0.75–1.06)
	Secondary education	1.38(1.03–1.85)	1.31(1.01–1.69)
Medical consultation	No	1	1
	Yes	2.05(1.60–2.63)	2.15(1.76–2.61)
Hospitalization in preceding 12 months	No	1	1
	Yes	1.91(1.53–2.39)	1.83(1.52–2.21)
Number of non-antibiotic drug	None	1	1
	1–3	1.28(0.82–1.99)	2.13(1.33–3.41)
	≥4	3.36(2.15–5.23)	5.84(3.75–9.38)
Instrumental Daily Living Activities	No	1	1
	Yes	1.50(1.16–1.95)	1.24(1.01–1.51)
Daily Living Activities	No	1	1
	Yes	1.39(1.07–1.84)	1.35(1.09–1.66)
SNHS and EHIS	2003	1	1
	2006	1.57(1.08–2.28)	1.37(1.05–1.80)
	2009	0.98(0.65–1.48)	1.28(0.95–1.72)
	2012	1.25(0.84–1.84)	1.29(0.97–1.78)
	2014	1.46(1.01–2.11)	1.66(1.27–2.18)

AOR: Odds Ratio; CI: Confidence Interval; SNHS: Spanish National Health Survey; EHIS: European Health Interview Survey.