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Table 4 Newcastle-Ottawa modified for cross-sectional studies

From: Systematic review of factors influencing length of stay in ICU after adult cardiac surgery

Study Selection Comparability Outcome Total
Representativeness of the sample Sample size Confounding factors Assessment Statistical test
A* B* C D A* B A* B* A** B** C* D A* B
1. Abrahamyan, L., et al., Determinants of Morbidity and Intensive Care Unit Stay after Coronary Surgery. Asian Cardiovascular and Thoracic Annals   +    +      +    +   5
2. Atoui, R., et al., Risk factors for prolonged stay in the intensive care unit and on the ward after cardiac surgery.   +    +   + +      +   4
3. Augoustides, J.G., et al., Clinical predictors for prolonged intensive care unit stay in adults undergoing thoracic aortic surgery requiring deep hypothermic circulatory arrest.   +    +   +    +    +   5
4. Azarfarin, R., et al., Factors influencing prolonged ICU stay after open heart surgery.      +   +    +    +   5
5. Cacciatore, F., et al., Determinants of prolonged intensive care unit stay after cardiac surgery in the elderly. +     +   + +   +    +   7
6. De Cocker, J., et al., Preoperative prediction of intensive care unit stay following cardiac surgery. +     +   + +   +    +   7
7. Eltheni, R., et al., Predictors of prolonged stay in the intensive care unit following cardiac surgery. +     +   +    +    +   6
8. Ghotkar, S.V., et al., Preoperative calculation of risk for prolonged intensive care unit stay following coronary artery bypass grafting. +     +      +    +   5
9. Giakoumidakis, K., et al., Risk factors for prolonged stay in cardiac surgery intensive care units.   +    +     +   +   +   6
10. Hein, O.V., et al., Prolonged intensive care unit stay in cardiac surgery: risk factors and long-term-survival. +     +   +    +    +   6
11. Herman, C., et al., Predicting prolonged intensive care unit length of stay in patients undergoing coronary artery bypass surgery--development of an entirely preoperative scorecard. +     +   +    +    +   6
12. Horer, J., et al., Risk factors for prolonged intensive care treatment following atrial septal defect closure in adults.   +     +     +     + 3
13. Lei, Q., et al., Preoperative and intraoperative risk factors for prolonged intensive care unit stay after aortic arch surgery.   +     + +    +    +   5
14. Nakasuji, M., M. Matsushita, and A. Asada, Risk factors for prolonged ICU stay in patients following coronary artery bypass grafting with a long duration of cardiopulmonary bypass. +      +     +    +   4
15. Scott, B.H., F.C. Seifert, and R. Grimson, Blood transfusion is associated with increased resource utilisation, morbidity and mortality in cardiac surgery.   +    +     +      + 5
16. Scott, B.H., et al., Octogenarians undergoing coronary artery bypass graft surgery: resource utilization, postoperative mortality, and morbidity.   +    +   +    +    +   6
17. Tribuddharat, S., et al., Development of an open-heart intraoperative risk scoring model for predicting a prolonged intensive care unit stay.   +     + +    +    +   5
18. Wagener, G., et al., The Surgical Procedure Assessment (SPA) score predicts intensive care unit length of stay after cardiac surgery.   +    +   +    +    +   5
19. Wang, C., et al., Risk model of prolonged intensive care unit stay in Chinese patients undergoing heart valve surgery. +     +   +    +    +   6
20. Widyastuti, Y., et al., Length of intensive care unit stay following cardiac surgery: is it impossible to find a universal prediction model? +     +   +    +    +   6
21. Bignami et al. Urinary neutrophil gelatinase-associated lipocalin as an early predictor of prolonged intensive care unit stay after cardiac surgery   +    +      +    +   5
22. Venrooij et al. The impact of low preoperative fat-free body mass on infections and length of stay after cardiac surgery: A prospective cohort study +     +   +    +    +   6
23. Stransky et al. Hypoactive Delirium After Cardiac Surgery as an Independent Risk Factor for Prolonged Mechanical Ventilation +     +   +    +    +   6
24. Ezeldin Relation between serum creatinine and postoperative results of open-heart surgery +     +   +    +    +   6
25. Wies et al. Indocyanine green clearance as an outcome prediction tool in cardiac surgery: A prospective study +     +   + +   +    +   7
26. Barili et al. An original model to predict Intensive Care Unit length-of stay after cardiac surgery in a competing risk framework +     +   +    +    +   6
27. Oliveira E, et al., Risk factors for prolonged hospital stay after isolated coronary artery bypass grafting +     +   +    +    +   6
  1. The number of stars for each item is represented by asterisks*