| ASFR | age-specific fertility rate |
|---|---|
| ASMR | age-standardized mortality ratio |
| AS-SCORE | age, stage of disease, physiological system involved, complications, response to therapy |
| BA | Bachelor of Arts; backache; bacterial agglutination; basilar artery; basion; benzyladenine; best amp... |
| BAQ | brain-age quotient |