Smoking exposure, loss of forced expiratory volume in one second and the risk of lung cancer among patients with malignant disease who present with cardiac or pulmonary symptoms: a cross-sectional study

Table 1 Demographic and clinical characteristics in the entire study group and in the three strata of FEV1 loss

^aMean value ± 1 standard deviation
^bChi square test
^cOne way analysis of variance
^dKruskal-Wallis test
^eHistory of coronary artery disease defined as either angiographically proven coronary artery disease or a hospital diagnosis of myocardial infarction, presence of atrial fibrillation, impaired left ventricular systolic function (ejection fraction <50%), significant valvular heart disease, pulmonary hypertension, or left ventricular hypertrophy. Comprehensive definitions of these conditions are in given in reference 3
^fResidual tumor at the time of referral or time interval between cancer surgery/end of chemotherapy/radiotherapy and referral <3 months
^gEstimated glomerular filtration rate
^hFEV1 loss [% predicted] = 100% - FEV1 % predicted
ⁱNumbers of patients with {squamous cell cancer – adenocarcinoma – other histologic subtype}
^jMedian value, with interquartile range in brackets
^kFisher’s exact test, distribution of histologic subtypes
^lOne way analysis of variance for the log transformed values

ISSN: 1617-9625