Correction: Emergency presentation of colorectal patients in Spain.

[This corrects the article DOI: 10.1371/journal.pone.

Emergency presentation of colorectal patients in Spain.

Background: Colorectal cancer (CRC) is the leading cause of cancer deaths in Europe. Survival is poorer in patients admitted to hospitals through the emergency department than in electively admitted patients. Knowledge of factors associated with a cancer diagnosis through presentation at an emergency department may reduce the likelihood of an emergency diagnosis.

Time to diagnosis and stage of symptomatic colorectal cancer determined by three different sources of information: A population based retrospective study.

Background: Survival rates from colorectal cancer (CRC) are highly variable in Europe. This variability could potentially be explained by differences in healthcare system delays in diagnosis. However, even when such delays are reduced, the relationship of the diagnostic interval (time from presentation with symptoms to diagnosis) with outcome is uncertain.

Age differences in presentation, diagnosis pathway and management of colorectal cancer.

Background: The gap in survival between older and younger European cancer patients is getting wider. It is possible that cancer in the elderly is being managed or treated differently than in their younger counterparts. This study aims to explore age disparities with respect to the clinical characteristics of the tumour, diagnostic pathway and treatment of colorectal cancer patients.

Factors related with symptom duration until diagnosis and treatment of symptomatic colorectal cancer.

Background: Colorectal cancer (CRC) survival depends mostly on stage at the time of diagnosis. However, symptom duration at diagnosis or treatment have also been considered as predictors of stage and survival. This study was designed to: 1) establish the distinct time-symptom duration intervals; 2) identify factors associated with symptom duration until diagnosis and treatment.

Diagnosis delay and follow-up strategies in colorectal cancer. Prognosis implications: a study protocol.

Background: Controversy exists with regard to the impact that the different components of diagnosis delay may have on the degree of invasion and prognosis in patients with colorectal cancer. The follow-up strategies after treatment also vary considerably. The aims of this study are: a) to determine if the symptoms-to-diagnosis interval and the treatment delay modify the survival of patients with colorectal cancer, and b) to determine if different follow-up strategies are associated with a higher survival rate.

Factors influencing delay in the diagnosis of colorectal cancer: a study protocol.

Background: Colorectal cancer (CRC) is the second most frequent tumor in developed countries. Since survival from CRC depends mostly on disease stage at the time of diagnosis, individuals with symptoms or signs suspicious of CRC should be examined without delay. Many factors, however, intervene between symptom onset and diagnosis.

Non-specific low back pain in primary care in the Spanish National Health Service: a prospective study on clinical outcomes and determinants of management.

Background: The Spanish National Health Service is a universal and free health care system. Non-specific low back pain (LBP) is a prevalent disorder, generating large health and social costs. The objectives of this study were to describe its management in primary care, to assess patient characteristics that influence physicians' decisions, and to describe clinical outcome at 2 months.

Posttraumatic stress disorder in primary care with special reference to personality disorder comorbidity.

Background: Posttraumatic stress disorder (PTSD) is a common and disabling disturbance in primary care. Few studies have been carried out in primary care samples and none have taken into consideration the association between PTSD and personality disorder.

Aim: To describe prevalence and risk factors of PTSD and its comorbidity with personality disorder.