Table 3.

Generalized Linear Mixed Model for Probability of Surgical Complication and 30-day Readmission of Free Flap, 2001–2012 in Taiwan ^†

Outcome	Surgical Complication			30-day Readmission
Parameter	Odds Ratio	95% CI	P-value	Odds Ratio	95% CI	P-value
No of patients, 25,327
Gender
Female	0.89	0.79–1.00	0.05*	0.93	0.84–1.03	0.20
Male (ref)
Patient age	0.99	0.99–1.00	<.01*	0.99	0.99–0.99	<.01*
Elixhauser	1.06	1.03–1.09	<.01*	1.20	1.17–1.23	<.01*
Emergency
Yes	1.08	0.87–1.33	0.48	0.93	0.75–1.15	0.53
No (ref)
Surgeon experience (year)	0.98	0.97–0.99	<.01*	1.00(4)	0.99–1.01	0.09
Surgeon volume	1.00(1)	1.00–1.01	0.07	0.99	0.99–1.00	0.64
Hospital type
Public	0.73	0.54–0.98	0.04*	0.95	0.74–1.23	0.73
Private (ref)
Teaching hospital
Yes	0.90	0.37–2.16	0.81	0.67	0.33–1.38	0.28
No (ref)
Geographic location
Central	0.95	0.67–1.34	0.75	0.76	0.57–1.03	0.08
Eastern	1.00(2)	0.53–1.91	1.00	1.25	0.72–2.16	0.42
Southern	1.15	0.85–1.54	0.37	0.74	0.57–0.95	0.02*
Northern (ref)
Average number of beds	1.00(3)	1.00–1.00	<.01*	1.00(5)	1.00–1.00	0.88
Average number of plastic surgeons	1.04	1.02–1.05	<.01*	0.99	0.98–1.00	0.56
Hospital volume	0.99	0.99–1.00	<.01*	0.99	0.99–1.00	0.07

^†From Taiwan’s National Health Insurance Research Database 2001–2012

^*Significantly at the 95% confidence interval.

⁽¹⁾Odds Ratio=1.0036;

⁽²⁾Odds Ratio = 1.0014;

⁽³⁾Odds Ratio=1.0003;

⁽⁴⁾Odds Ratio=1.008;

⁽⁵⁾Odds Ratio= 1.000007