Table 3

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)
 20071.17 (0.84 to 1.63)1.23 (0.97 to 1.55)1.10 (0.97 to 1.26)1.17 (1.05 to 1.30)
 20081.03 (0.75 to 1.42)1.30 (1.05 to 1.62)1.14 (1.00 to 1.29)1.18 (1.06 to 1.31)*
 20090.99 (0.71 to 1.36)1.13 (0.90 to 1.42)1.08 (0.95 to 1.23)1.13 (1.02 to 1.25)*
 20101.10 (0.81 to 1.50)1.06 (0.85 to 1.32)1.04 (0.92 to 1.18)1.01 (0.92 to 1.12)
 20110.96 (0.70 to 1.31)0.98 (0.79 to 1.23)1.04 (0.92 to 1.18)1.15 (1.04 to 1.27)*
Sex (ref female)
 Male0.86 (0.71 to 1.04)0.95 (0.83 to 1.08)1.07 (0.99 to 1.15)0.93 (0.88 to 0.99)*
Age (ref <60)
 60–692.08 (1.52 to 2.85)*1.94 (1.57 to 2.41)*1.11 (1.00 to 1.23)1.38 (1.28 to 1.50)*
 70–792.84 (2.12 to 3.81)*2.66 (2.17 to 3.25)*1.21 (1.09 to 1.34)*1.68 (1.54 to 1.83)*
 80+4.57 (3.44 to 6.05)*4.52 (3.72 to 5.48)*1.62 (1.45 to 1.80)*1.90 (1.74 to 2.09)*
Comorbidity (ref <10)
 >102.58 (2.07 to 3.21)*3.79 (3.23 to 4.45)*2.19 (2.01 to 2.38)*2.83 (2.65 to 3.08)*
Pathology (ref HPB)
 Bowel ischaemia7.62 (4.48 to 12.96)*4.59 (3.26 to 6.45)*1.82 (1.51 to 2.19)*0.47 (0.40 to 0.56)*
 Bowel obstruction0.45 (0.26 to 0.78)*0.62 (0.44 to 0.87)0.73 (0.63 to 0.86)*0.72 (0.63 to 0.81)*
 Peritonitis3.16 (1.78 to 5.63)*2.00 (1.37 to 2.93)*1.16 (0.95 to 1.42)0.41 (0.34 to 0.48)*
 Diverticulitis1.06 (0.47 to 2.40)1.18 (0.70 to 1.99)0.99 (0.74 to 1.32)1.71 (1.32 to 2.20)*
 GI ulcers1.19 (0.66 to 2.16)1.56 (1.09 to 2.24)0.73 (0.61 to 0.89)0.81 (0.69 to 0.94)*
 Hernias0.65 (0.37 to 1.15)0.54 (0.37 to 0.78)*0.54 (0.46 to 0.64)0.70 (0.61 to 0.80)*
 Miscellaneous2.27 (1.26 to 4.08)*1.69 (1.15 to 2.47)*1.14 (0.94 to 1.39)1.20 (1.01 to 1.42)

  • The data presented are for the subgroup of patients who underwent surgery (cohort of 19 082 patients).

  • *p<0.01.