Determinants of medical care utilization.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005191:Family Characteristics; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007354:Insurance, Major Medical; D008297:Male; D008499:Medical Records; D008875:Middle Aged; D009922:Oregon; D010548:Personal Health Services / Q000706:statistics & numerical data*; D012494:Sampling Studies; D012959:Socioeconomic Factors