Table 4.

Factors influencing complications (of significant or trending towards significant influence)

	No postoperative complication (n = 241)	With postoperative complication (n = 49)	OR (95% CI)	P-value
Histopathology, n (%)
Gangrenous cholecystitis	83 (35%)	23 (47%)	1.7 (0.9–3.1)	0.098
Demographic, n (%)
Age > 70 years	77 (32%)	34 (69%)	4.8 (2.5–9.4)	<0.001
Comorbidity, n (%)
Ischaemic heart disease	29 (12%)	11 (22%)	2.1 (1.0–4.6)	0.054
Chronic renal failure	14 (6%)	9 (18%)	3.6 (1.5–9.0)	0.003
Diabetes	23 (10%)	16 (33%)	4.6 (2.2–9.6)	<0.001
COAD	10 (4%)	8 (16%)	4.5 (1.7–12.1)	0.001
Smoker	56 (27%)	5 (10%)	0.3 (0.1–0.9)	0.026
Glucosteroid use	3 (1%)	3 (6%)	5.1 (1.0–26.1)	0.030
Fever (>38 °C)	49 (20%)	18 (37%)	2.3 (1.2–4.4)	0.016
Hypotension (BP < 100 mmHg)	13 (5%)	6 (12%)	2.5 (0.9–6.8)	0.077
Muscle rigidity	35 (15%)	16 (33%)	2.8 (1.4–5.7)	0.002
ASA class, n (%)			N/A	<0.001
I	50 (20.8%)	4 (8.2%)
II	140 (58.3%)	17 (34.7%)
III	46 (19.2%)	26 (53.1%)
IV	4 (1.7%)	2 (4.1%)
Haemoglobin < 130 g/l, n (%)	46 (19%)	17 (35%)	2.3 (1.2–4.5)	0.013
Albumin < 35 g/l, n (%)	47 (20%)	17 (36%)	2.3 (1.2–4.5)	0.014
Creatinine > 90 µmol/l, n (%)	67 (28%)	21 (43%)	1.9 (1.0–3.7)	0.033
Urea > 6 mmol/l, n (%)	61 (25%)	24 (49%)	2.8 (1.5–5.3)	0.001

OR, odds ratio; 95% CI, 95% confidence interval; COAD, chronic obstructive airway disease; BP, blood pressure; ASA, American Society of Anesthesiologists; N/A, not applicable.

Missing values: smoker, n = 41; steroid use, n = 3; muscle rigidity, n = 1; haemoglobin, n = 2; albumin, n = 6; urea, n = 1; creatinine, n = 1.