A Literature review of sources of bias in Self Assessed Health ratings;

This literature review reveals Self Assessed Health rating is all about the context. Context of: the individual; the question; the survey, leading to gaps between observed versus perceived health information, health experience versus health expectations, presentation versus answering of questions. These gaps creates 7 sources of biases in Self Assessed Health ratings: availability of objective health information, subjective health information, use of self-concept in health, over-confidence and optimism, framing effects, social desirability, and satisficing. Potential for such sources of biases should be noted and corrected for when necessary, to facilitate more accurate health policy assessments and cross countries equality comparisons.