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Table 3 Multivariate model output from backward stepwise selection model including only variables that are significant at (p < 0.01) in the multivariate model

From: The Marsden Morbidity Index: the derivation and validation of a simple risk index scoring system using cardiopulmonary exercise testing variables to predict morbidity in high-risk patients having major cancer surgery

Variable

OR (95% CI)

p-value

VO2 max (continuous)

0.82 (0.77–0.86)

< 0.001

AT (continuous)

0.66 (0.61–0.71)

< 0.001

AT VE/VCO2 (continuous)

1.33 (1.26–1.40)

< 0.001

COPD

 No

1

0.001

 Yes

1.99 (1.33–2.98)

 

Chronic renal impairment

 No

1

< 0.001

 Yes

7.50 (4.29–13.10)

 

Age group

  > 70 years

1

0.001

 51–70 years

0.35 (0.18–0.69)

0.003

 < 50 years

0.25 (0.12–0.51)

< 0.001

Diabetic status

 Negative

1

0.002

 Insulin

2.54 (1.52–4.23)

< 0.001

 Non-insulin dependent

1.02 (0.98–1.06)

0.831

BMI categories

 < 18.5

6.98 (2.91–16.74)

< 0.001

 18.5–24.99

1

< 0.001

 ≥ 25.0

1.72 (0.90–3.30)

0.102

Surgery type

 Robotic/laparoscopic

1

< 0.001

 Open

10.80 (5.77–20.19)

 

Cancer stage

 Primary

1

0.006

 Local nodal metastases

1.61 (0.84–3.09)

0.153

 Distant metastases

11.22 (2.31–54.66)

0.003

WHO category

 0

1

< 0.001

 ≥ 1

3.94 (2.58–6.03)

 

Prior TIA/stroke

 No

1

0.002

 Yes

3.07 (1.50–6.31)