Table 2

Patient-level variables used in the primary logistic regression modelling to determine geographical differences in outcome between the included centres

7-day mortality OR (95% CI)30-day mortality OR (95% CI)30-day readmission OR (95% CI)Long length of stay OR (95% CI)
Year (ref. 2012)
 20071.23 (1.06 to 1.42)*1.37 (1.22 to 1.53)*1.07 (1.00 to 1.15)1.24 (1.17 to 1.32)*
 20081.10 (0.96 to 1.26)1.24 (1.11 to 1.39)*1.11 (1.04 to 1.18)*1.17 (1.10 to 1.24)*
 20091.13 (0.99 to 1.30)1.25 (1.12 to 1.39)*1.10 (1.03 to 1.17)*1.13 (1.07 to 1.20)*
 20101.09 (0.95 to 1.25)1.13 (1.01 to 1.26)1.03 (0.96 to 1.09)1.09 (1.03 to 1.15)*
 20111.01 (0.88 to 1.16)1.08 (0.97 to 1.20)1.01 (0.95 to 1.08)1.10 (1.04 to 1.16)*
Sex (ref female)
 Male0.92 (0.85 to 1.00)0.96 (0.90 to 1.03)1.03 (0.99 to 1.07)0.90 (0.87 to 0.93)*
Age (ref <60)
 60–691.81 (1.54 to 2.13)*1.73 (1.54 to 1.95)*1.09 (1.03 to 1.15)*1.19 (1.14 to 1.25)*
 70–793.20 (2.77 to 3.69)*2.85 (2.56 to 3.17)*1.24 (1.17 to 1.30)*1.37 (1.30 to 1.48)*
 80+7.01 (6.83 to 8.01)*6.11 (5.53 to 6.76)*1.80 (1.71 to 1.90)*1.43 (1.36 to 1.50)*
Comorbidity (ref <10)
 >102.52 (2.30 to 2.76)*3.83 (3.55 to 4.13)*2.09 (2.00 to 2.18)*2.69 (2.59 to 2.79)*
Pathology (ref HPB)
 Bowel ischaemia8.11 (6.97 to 9.49)*4.85 (4.32 to 5.44)*1.70 (1.58 to 1.84)*0.49 (0.45 to 0.52)*
 Bowel obstruction1.13 (0.97 to 1.32)0.93 (0.83 to 1.03)1.02 (0.97 to 1.08)0.64 (0.61 to 0.67)*
 Peritonitis5.23 (4.36 to 6.26)*3.11 (2.70 to 3.57)*1.59 (1.46 to 1.79)*0.63 (0.58 to 0.68)*
 Diverticulitis1.90 (1.54 to 2.35)*1.52 (1.30 to 1.78)*1.04 (0.95 to 1.14)2.17 (2.02 to 2.34)*
 GI ulcers3.03 (2.43 to 3.78)*2.72 (2.31 to 3.20)*1.14 (1.02 to 1.26)1.65 (1.51 to 1.81)*
 Hernias1.04 (0.82 to 1.32)0.83 (0.70 to 0.99)0.75 (0.68 to 0.82)*1.62 (1.51 to 1.73)*
 Miscellaneous5.13 (4.35 to 6.04)*3.32 (2.94 to 3.76)1.69 (1.57 to 1.83)*1.41 (1.31 to 1.51)*

  • The data presented are for all EGS admissions (Cohort of 69 490 patients).

  • *p<0.01.