title: Assessment of fatigue using the Identity-Consequence Fatigue Scale in patients with lung cancer.
abstract: To evaluate the properties of the Identity-Consequence Fatigue Scale (ICFS) in patients with lung cancer (LC), assessing the intensity of fatigue and associated factors.
  This was a cross-sectional study involving LC patients, treated at a teaching hospital in Brazil, who completed the ICFS. Patients with chronic heart disease (CHD) and healthy controls, matched for age and gender, also completed the scale. Initially, a Brazilian Portuguese-language version of the ICFS was administered to 50 LC patients by two independent interviewers; to test for reproducibility, it was readministered to those same patients. At baseline, the LC patients were submitted to spirometry and the six-minute walk test, as well as completing the Epworth Sleepiness Scale (ESS), Hospital Anxiety and Depression Scale (HADS), Medical Outcomes Study 36-item Short-Form Health Survey (SF-36), and Fatigue Severity Scale (FSS). Inflammatory status was assessed by blood C-reactive protein (CRP) levels. To validate the ICFS, we assessed the correlations of its scores with those variables.
  The sample comprised 50 patients in each group (LC, CHD, and control). In the LC group, the intraclass correlation coefficients for intra-rater and inter-rater reliability regarding ICFS summary variables ranged from 0.94 to 0.76 and from 0.94 to 0.79, respectively. The ICFS presented excellent internal consistency, and Bland-Altman plots showed good test-retest reliability. The ICFS correlated significantly with FSS, HADS, and SF-36 scores, as well as with CRP levels. Mean ICFS scores in the LC group differed significantly from those in the CHD and control groups.
  The ICFS is a valid, reliable instrument for evaluating LC patients, in whom depression, quality of life, and CRP levels seem to be significantly associated with fatigue.
  Avaliar as propriedades da Escala de Identificação e Consequências da Fadiga (EICF) em pacientes com câncer de pulmão (CP), analisando a intensidade da fadiga e fatores associados.
  Estudo transversal com pacientes com CP, atendidos em um hospital-escola no Brasil, que preencheram a EICF. Pacientes com doenças cardíacas crônicas (DCC) e controles saudáveis, pareados por idade e sexo, também preencheram a escala. Inicialmente, uma versão brasileira da escala foi aplicada a 50 pacientes com CP por dois entrevistadores independentes; para testar a reprodutibilidade, ela foi reaplicada aos mesmos pacientes. No momento basal, os pacientes com CP realizaram espirometria e teste de caminhada de seis minutos, bem como preencheram a Epworth Sleepiness Scale (ESS), Hospital Anxiety and Depression Scale (HADS), Medical Outcomes Study 36-item Short-Form Health Survey (SF-36) e Fatigue Severity Scale (FSS). O estado inflamatório foi avaliado pelos níveis de proteína C reativa (PCR) no sangue. Para validar a EICF, avaliamos as correlações entre as pontuações na mesma e essas variáveis.
  A amostra foi composta por 50 pacientes em cada grupo (CP, DCC e controle). No grupo CP, os coeficientes de correlação intraclasse para confiabilidade intra e interobservador para as variáveis resumidas da EICF variaram de 0,94 a 0,76 e de 0,94 a 0,79, respectivamente. A EICF apresentou excelente consistência interna, e as disposições gráficas de Bland-Altman demonstraram boa confiabilidade teste-reteste. A EICF apresentou correlações significativas com as pontuações na FSS, HADS e SF-36, bem como com os níveis de PCR. As médias das pontuações na EICF do grupo CP diferiram significativamente das dos grupos DCC e controle.
  A EICF é um instrumento válido e confiável para a avaliação de pacientes com CP, nos quais depressão, qualidade de vida e níveis de PCR parecem estar significativamente associados à fadiga.
authors.affiliation: . Universidade Federal do Ceará - UFC - Fortaleza (CE) Brasil.|. Hospital de Messejana Dr. Carlos Alberto Studart Gomes, Fortaleza (CE) Brasil.
authors.forename: Ingrid Correia
authors.initials: IC
authors.lastname: Nogueira
authors.affiliation: . Universidade Federal do Ceará - UFC - Fortaleza (CE) Brasil.|. Hospital de Messejana Dr. Carlos Alberto Studart Gomes, Fortaleza (CE) Brasil.
authors.forename: Amanda Souza
authors.initials: AS
authors.lastname: Araújo
authors.affiliation: . Universidade Federal do Ceará - UFC - Fortaleza (CE) Brasil.|. Hospital de Messejana Dr. Carlos Alberto Studart Gomes, Fortaleza (CE) Brasil.|. Universidade de Fortaleza - UNIFOR - Fortaleza (CE) Brasil.
authors.forename: Maria Tereza
authors.initials: MT
authors.lastname: Morano
authors.affiliation: . Universidade Federal do Ceará - UFC - Fortaleza (CE) Brasil.
authors.forename: Antonio George
authors.initials: AG
authors.lastname: Cavalcante
authors.affiliation: . Universidade Federal do Ceará - UFC - Fortaleza (CE) Brasil.
authors.forename: Pedro Felipe de
authors.initials: PF
authors.lastname: Bruin
authors.affiliation: . Wellington Regional Hospital, Newtown, Wellington, New Zealand.
authors.forename: Johana Susan
authors.initials: JS
authors.lastname: Paddison
authors.affiliation: . Universidade de Fortaleza - UNIFOR - Fortaleza (CE) Brasil.|. Universidade de Fortaleza - UNIFOR - Fortaleza (CE) Brasil.
authors.forename: Guilherme Pinheiro da
authors.initials: GPD
authors.lastname: Silva
authors.affiliation: . Universidade Federal do Ceará - UFC - Fortaleza (CE) Brasil.|. Hospital de Messejana Dr. Carlos Alberto Studart Gomes, Fortaleza (CE) Brasil.
authors.forename: Eanes Delgado
authors.initials: ED
authors.lastname: Pereira
mesh_terms: D000368:Aged; D001938:Brazil; D002097:C-Reactive Protein / Q000032:analysis; D016022:Case-Control Studies; D002908:Chronic Disease; D003430:Cross-Sectional Studies; D005221:Fatigue / Q000175:diagnosis* / Q000503:physiopathology* / Q000523:psychology; D005260:Female; D006331:Heart Diseases / Q000503:physiopathology; D006801:Humans; D008175:Lung Neoplasms / Q000473:pathology / Q000503:physiopathology* / Q000523:psychology; D008297:Male; D008875:Middle Aged; D011569:Psychiatric Status Rating Scales; D011788:Quality of Life / Q000523:psychology; D015203:Reproducibility of Results; D057566:Self Report / Q000592:standards*; D012720:Severity of Illness Index; D013147:Spirometry; D018709:Statistics, Nonparametric; D013997:Time Factors; D014177:Translations; D000070857:Walk Test
chemical_list: D002097:C-Reactive Protein