A study to find the link between socioeconomic status and length of survival among acquired immune deficiency syndrome (AIDS) patients used 18,167 patients in San Francisco, CA, aged 13 years or older between Jan 1985 and Dec 1995. After considering such factors as the type of neighborhood, sex, age, ethnicity, site of AIDS diagnosis, time period of AIDS diagnosis, researchers found no association between socioeconomic status and length of survival.