Table 5.

Generalised linear regression model with log link and gamma distribution (2018–2021).

Variables	2018		2019		2020		2021
	Estimate	SE	Estimate	SE	Estimate	SE	Estimate	SE
Intercept	6.558 **	0.389	5.029 **	0.502	5.316 **	0.344	5.507 **	0.284
Hospitalisation status
Emergency (Ref: non-emergency)	0.257	0.119	−0.198	0.158	−0.294 *	0.132	−0.126	0.089
Gender
Male (Ref: female)	−0.159 *	0.110	0.029	0.156	0.223	0.120	0.021	0.090
Age	−0.012 *	0.005	0.009	0.006	0.005	0.005	−0.004	0.003
Comorbidities
Hypertensive diseases (Ref: no)	−0.399 *	0.123	0.042	0.199	0.146	0.143	0.244 *	0.088
Ischemic heart diseases (Ref: no)	−0.089	0.152	−0.240	0.208	0.303 *	0.145	0.130	0.116
Diabetes mellitus (Ref: no)	0.056	0.165	−0.308	0.217	−0.029	0.152	0.308 *	0.103
Atrial fibrillation (Ref: no)	−0.265	0.226	–	–	–	–	0.142	0.175
Renal diseases (Ref: no)	0.369	0.249	0.075	0.301	−0.177	0.202	−0.220	0.141
Dyslipidemia (Ref: no)	–	–	–	–	–	–	−0.398	0.225
Pneumonia (Ref: no)	0.786 *	0.244	0.728 *	0.284	0.831 **	0.155	0.709 **	0.109
Length of stay	0.088 **	0.009	0.135 **	0.019	0.065 **	0.010	0.135 **	0.012

Note: SE: standard error.

*p < 0.05.

**p < 0.001.