The Boston AIDS Survival Score (BASS): a multidimensional AIDS severity instrument. |
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| Authors: | G R Seage rd C Gatsonis J S Weissman J S Haas P D Cleary F J Fowler M P Massagli V E Stone D E Craven H Makadon J Goldberg K Coltin K S Levin and A M Epstein |
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| Institution: | G R Seage, 3rd, C Gatsonis, J S Weissman, J S Haas, P D Cleary, F J Fowler, M P Massagli, V E Stone, D E Craven, H Makadon, J Goldberg, K Coltin, K S Levin, and A M Epstein |
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| Abstract: | OBJECTIVES: This study developed a new acquired immunodeficiency syndrome (AIDS) severity system by including diagnostic, physiological, functional, and sociodemographic factors predictive of survival. METHODS: Three-hundred five persons with AIDS in Boston were interviewed; their medical records were reviewed and vital status ascertained. RESULTS: Overall median (+/- SD) survival for the cohort from the first interview until death was 560 +/- 14.4 days. The best model for predicting survival, the Boston AIDS Survival Score, included the Justice score (stage 2 relative hazard RH] = 1.25, 95% confidence interval CI] = 0.80, 1.96; stage 3 RH = 1.76, 95% CI = 1.15, 2.70), a newly developed opportunistic disease score (Boston Opportunistic Disease Survival Score; stage 2 RH = 1.35, 95% CI = 0.90, 2.02; stage 3 RH = 2.10, 95% CI = 1.38, 3.18), and measures of activities of daily living (any intermediate limitations, RH = 1.84, 95% CI = 1.05, 3.21; any basic limitations, RH = 2.60, 95% CI = 1.44, 4.69). This model had substantially greater predictive power (R2 = .17, C statistic = .68) than the Justice score alone (R2 = .09, C statistic = .61). CONCLUSIONS: Incorporating data on clinically important events and functional status into a physiologically based system can improve the prediction of survival with AIDS. |
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