Cancer patient ethnicity and associations with emotional distress--the 6th vital sign: a new look at defining patient ethnicity in a multicultural context.

Variations in access to care, utilization of available resources and treatment outcomes in the context of ethnicity have been recognized, but very little research of this nature exists in the oncology context. The present paper is an in-depth analysis of data on a large representative sample of Canadian cancer patients with a focus on the role of 'ethnicity', its association to psychological distress, and its impact on the cancer experience. Because of a heterogeneous representation of ethnic self-identifications which were not easily grouped or classified, English as a second language was considered as a surrogate marker to ethnicity. People who self-reported to be from an English-speaking country were grouped together and compared to those hailing from countries which do not have English as a primary language. In a hierarchical logistic regression model (n = 2,402) the demographic and cancer-related variables associated with significant clinical distress in the first block were gender (male, except those with prostate cancer), age less that 68 years, less than a year since diagnosis, diagnosis of lung cancer, and recurrent disease. In the second block, after controlling for the influence of these factors, patient-reported ethnicity (being originally from a non-English speaking country) added significantly to the prediction of patient distress. Though compelling, there is a need to understand the relationship between the ethnic features and language (English versus non-English language). A hypothesis is presented as an attempt to understand an individual's 'ethnicity' within the framework of a multicultural society.