Factors associated with postoperative costs following anatomic lung resections without major complications.

OBJECTIVES: To detect factors associated with costs of anatomic lung resection without major complications. METHODS: Two hundred and fifty consecutive patients submitted to anatomic lung resection (185 by VATS) in 1 fiscal year (1 April 201431 March 2015) were included. Thoracic Morbidity and Mortality (TMM) system was used to grade the severity of complications. Two hundred and ten patients who did not develop major complications (TMM < 3) were analysed. Postoperative costs were retrieved from the Financial Department through a Patient Level Information and Costing System. Multivariable regression and bootstrap analyses were used to test the association of several baseline patient characteristics with costs and obtain an aggregate scoring system to estimate postoperative costs. RESULTS: Among the 210 patients, 117 (56%) did not develop any complication and 93 (44%) had minor complications. Their average postoperative cost was 4040, significantly lower than the one observed in patients with major complications (13 156(sic), P < 0.0001). Multivariable regression revealed that open thoracotomy (P = 0.01), carbon monoxide lung diffusion capacity (DLCO) < % (P = 0.001) and coronary artery disease (CAD) (P = 0.009) were associated with postoperative costs. Open thoracotomy would increase the cost by 648(sic), DLCO < 60% by 935(sic) and CAD by 1043(sic). If all three factors were present, they would cause an increase of postoperative costs from 3592(sic) to 6219(sic). CONCLUSION: We were able to identify clinical factors associated with postoperative costs in patients without major complications. Recognizing groups of increased cost may lead to specific process analyses aimed at optimising their pathways of care and ultimately saving money. Moreover, these findings may help administrators to tailor future individualized lung resection reimbursement tariffs based on patient characteristics.