Authors are experiencing increasing competition for their articles to be published. One way of ensuring their work is given the best chance of being published is to underpin their research with rigorous methods that are characterized by robustness, accuracy and reliability. A common factor that can stymie research rigour is common method bias. Our aim in this article is to outline the nature of, concerns about and examine reasons why researchers still conduct studies that are susceptible to common method bias. We also provide some solutions for avoiding or managing common method bias concerns. In doing this, we acknowledge the substantial work that has been produced on this topic to date and, therefore, focus our contribution specifically on issues that affect research in applied and managerial settings. JEL Classification: C90, D23
The influence of pulmonary resection on functional capacity can be assessed in different ways. The aim of this study was to compare the effect of lobectomy and pneumonectomy on pulmonary function tests (PFT), exercise capacity and perception of symptoms.Sixty eight patients underwent functional assessment with PFT and exercise testing before (Preop), and 3 and 6 months after lung resection. In 50 (36 males and 14 females; mean age 61 yrs) a lobectomy was performed and in 18 (13 males and 5 females; mean age 59 yrs) a pneumonectomy was performed.Three months after lobectomy, forced vital capacity (FVC), forced expiratory volume in one second (FEV1), total lung capacity (TLC), transfer factor of the lungs for carbon monoxide (TL,CO) and maximal oxygen uptake (V'O 2 ,max) were significantly lower than Preop values, increasing significantly from 3 to 6 months after resection. Three months after pneumonectomy, all parameters were significantly lower than Preop values and significantly lower than postlobectomy values and did not recover from 3 to 6 months after resection. At 6 months after resection significant deficits persisted in comparison with Preop: for FVC 7% and 36%, FEV1 9% and 34%, TLC 10% and 33% for lobectomy and pneumonectomy, respectively; and V'O 2 ,max 20% after pneumonectomy only. Exercise was limited by leg muscle fatigue in 53% of all patients at Preop. This was not altered by lobectomy, but there was a switch to dyspnoea as the limiting factor after pneumonectomy (61% of patients at 3 months and 50% at 6 months after resection). Furthermore, pneumonectomy compared to lobectomy led to a significantly smaller breathing reserve (mean±SD) (28±13 vs 37±16% at 3 months; and 24±11% vs 33±12% at 6 months post resection) and lower arterial oxygen tension at peak exercise 10.1±1.5 vs 11.5±1.6 kPa (76±11 vs 86±12 mmHg) at 3 months; 10.1±1.3 vs 11.3±1.6 kPa (76±10 vs 85±12 mmHg) at 6 months postresection.We conclude that measurements of conventional pulmonary function tests alone overestimate the decrease in functional capacity after lung resection. Exercise capacity after lobectomy is unchanged, whereas pneumonectomy leads to a 20% decrease, probably due to the reduced area of gas exchange.
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