Attitudes toward Medicare among older people.
D000367:Age Factors; D000368:Aged; D001294:Attitude to Health; D005260:Female; D006801:Humans; D007182:Income; D008297:Male; D006278:Medicare; D008875:Middle Aged; D010287:Parent-Child Relations; D010817:Physician-Patient Relations; D011153:Population; D012494:Sampling Studies; D012737:Sex Factors; D012959:Socioeconomic Factors; D014481:United States