[Hospital LOS, medical complexity and deprivation indicators].

Background: Several studies have shown that socioeconomic deprivation is associated with increased hospitalization lengths of stay (LOS) and costs. Yet, the French DRG-based information system (PMSI) does not take deprived situations into account. Hence, we aimed at extracting routinely available variables measuring deprivation from the Hospital Information System and at assessing their association with severity of illness and hospital LOS.

Characteristics and prognosis of resected T3 non-small cell lung cancer.

Background: T3 tumors can be divided into several subgroups depending on the type of anatomical structure invaded: chest wall, mediastinal pleura, or main bronchus. The aim of this study was to analyze the characteristics and prognosis of each subgroup of T3 tumors.

Methods: The results of surgical treatment were retrospectively analyzed for 261 patients with T3 non-small cell lung cancer invading either the mediastinal pleura or parietal pericardium by direct extension (mediastinal pT3, n = 68), or main bronchus (bronchial pT3, n = 68), or chest wall (chest wall pT3, n = 125) that were operated on between 1984 and 1996.

[Non-small cell lung cancer: surgical trends as a function of age].

Most of the studies on lung cancer and age are usually done on very young or very old populations. We conducted a study of the evolution of surgical features over time in a population aged 24 to 89 years. The series included 1,809 men and 287 women (n = 2,096) who had undergone surgery between April 1984 and December 1990 (n = 1,026) and between January 1991 and December 1996 (n = 1,996).

Visceral pleura invasion by non-small cell lung cancer: an underrated bad prognostic factor.

Background: Visceral pleura invasion (VPI) by non-small cell lung cancer is a factor of poor prognosis. A tumor of any size that invades the visceral pleura is classified as T2. Few studies have been conducted concerning the prognostic significance of VPI relative to other staging factors.