Table 1: Patients’ demographic and clinical characteristics, received treatment, and outcomes.

CharacteristicsOverall ()80–85.4 years ()85.4–90 years ()

Age, years85.7 ± 482.5 ± 189.0 ± 3<0.001
Male gender184 (53)93 (53.5)91 (52.3)0.8
Diabetes104 (30)52 (29.9)52 (29.9)1
ASA III193 (55.5)93 (53.4)100 (57.5)0.4
ASA IV43 (12.5)17 (9.8)26 (14.9)0.1
Anticoagulation therapy77 (22.1)38 (21.8)39 (22.4)0.9
History of biliary disease40 (11.5)20 (11.5)20 (11.5)1
Choledocholithiasis28 (8.0)11 (6.3)17 (9.8)0.2
Symptom days at admission3.1 ± 3.92.8 ± 3.33.5 ± 4.60.1
AC grade0.1
 Grade I106 (30.5)45 (25.9)61 (35.1)
 Grade II189 (54.3)104 (59.8)85 (48.9)
 Grade III53 (15.2)25 (14.4)28 (16.1)
Received treatment
 Antibiotics only210 (60.3)91 (52.3)119 (68.4)0.006
 Cholecystostomy (<48 hrs)25 (7.2)5 (2.9)20 (11.5)0.002
 Early cholecystectomy (<48 hrs)113 (32.5)74 (42.5)34 (19.5)<0.001
Total cholecystectomy119 (34.2)80 (46.0)39 (22.4)<0.001
 Laparoscopic cholecystectomy104 (87.4)72 (90.0)32 (82.1)0.2
 Conversion to open surgery12 (11.5)9 (12.5)3 (9.4)0.6
Days of antibiotic therapy7.5 ± 37.3 ± 3.47.6 ± 3.30.4
Days of hospital stay6.5 ± 56.0 ± 4.16.7 ± 6.00.6
30-day complications60 (17.2)32 (18.4)28 (16.1)0.5
30-day mortality13 (3.7)4 (2.3)9 (5.2)0.1
30-day readmission14 (4.2)10 (5.9)4 (2.4)0.1
2-year AC recurrence49 (22.1)20 (21.7)29 (22.3)0.9
2-year biliary readmission77 (34.7)34 (37.0)43 (33.1)0.5