Table 1.

Study population, overall and by cholecystectomy procedure: distribution by age, gender, severity of cholelitiasis, previous upper abdominal surgery, type of admission, comorbidities—Lazio Region, Italy, January 2007–September 2008

Patient characteristics	Laparoscopic cholecystectomy		Open cholecystectomy		Total
	N	%	N	%	N	%
Total	11 752	86.1	1899	13.9	13 651	100.0
Age (years)
<70	9913	84.4	1162	61.2	11 075	81.1
70–79	1543	13.1	485	25.5	2028	14.9
≥80	296	2.5	252	13.3	548	4.0
Gender
Men	4349	37.0	979	51.6	5328	39.0
Women	7403	63.0	920	48.4	8323	61.0
Severity of cholelitiasis
Low	4767	40.6	470	24.7	5237	38.4
Moderate	6456	54.9	1200	63.2	7656	56.1
High	529	4.5	229	12.1	758	5.6
Previous upper abdominal surgery
No	11714	99.7	1867	98.3	13581	99.5
Yes	38	0.3	32	1.7	70	0.5
Type of admission
Elective	8690	73.9	903	47.6	9593	70.3
Emergency	3062	26.1	996	52.4	4058	29.7
Comorbidities
Cancer	232	2.0	75	3.9	307	2.2
Diabetes	268	2.3	100	5.3	368	2.7
Obesity	115	1.0	25	1.3	140	1.0
Blood disease	146	1.2	62	3.3	208	1.5
Hypertension	842	7.2	247	13.0	1089	8.0
Ischaemic heart disease	246	2.1	107	5.6	353	2.6
Past coronary revascularisation	63	0.5	22	1.2	85	0.6
Heart failure	47	0.4	41	2.2	88	0.6
Other heart disease	158	1.3	76	4.0	234	1.7
Conduction disorders or dysrhythmia	250	2.1	95	5.0	345	2.5
Cerebrovascular disease	146	1.2	74	3.9	220	1.6
Vascular disease	91	0.8	38	2.0	129	0.9
COPD or respiratory failure	189	1.6	84	4.4	273	2.0
Chronic nephropathy	68	0.6	46	2.4	114	0.8
Chronic disease of the liver or pancreas	219	1.9	70	3.7	289	2.1

COPD, chronic obstructive pulmonary disease.