Table 4. Factors predicting inappropriate use of antibiotics on multivariate analysis.

Characteristic	Adjusted OR (95% CI)	P value
Physicians Sex: ref = Female
Male	1.65 (1.54, 1.78)	< 0.001
Age: ref = 25–31 years (years)
32–38	0.58 (0.53, 0.64)	< 0.001
39–75	0.30 (0.27, 0.35)	< 0.001
Education: ref = College
Junior college	1.30 (1.21, 1.39)	< 0.001
Technical secondary school	1.60 (1.42, 1.80)	< 0.001
Work duration: ref = ≤ 5 (years)
6–10	1.36 (1.25, 1.48)	< 0.001
11–20	3.14 (2.78, 3.54)	< 0.001
21–30	3.80 (3.20, 4.53)	< 0.001
≥ 31	1.54 (1.29, 1.83)	< 0.001
Professional title: ref = Resident physician
Attending physician	0.97 (0.87, 1.08)	0.60
Associate chief physician	1.99 (1.62, 2.43)	< 0.001
Patient Sex: ref = Female
Male	0.98 (0.92, 1.04)	0.46
Age: ref. < 5 (years)
5–17	0.76 (0.69, 0.83)	< 0.001
18–49	1.25 (1.14, 1.36)	< 0.001
50–64	1.36 (1.22, 1.50)	< 0.001
≥ 65	1.20 (1.08, 1.34)	< 0.001
Route: ref = Injection
Oral	0.49 (0.45, 0.53)	< 0.001
Payment source: ref = Out-of-pocket
New rural cooperative medical care system	1.18 (1.08, 1.30)	< 0.001

OR: Odds ratio, CI: Confidence interval