Rf. Breiman et al., Evaluation of effectiveness of the 23-valent pneumococcal capsular polysaccharide vaccine for HIV-infected patients, ARCH IN MED, 160(17), 2000, pp. 2633-2638
Citations number
27
Categorie Soggetti
General & Internal Medicine","Medical Research General Topics
Background: We conducted a retrospective case-control study to evaluate eff
ectiveness of pneumococcal vaccine against invasive disease among adults wi
th human immunodeficiency virus (HIV) infection in San Francisco, Calif, an
d Atlanta, Ga.
Methods: Case patients were 18- to 55-year-old subjects with HIV infection
who were admitted to selected hospitals in Atlanta or San Francisco from Fe
bruary 1992 to April 1995 from whom Streptococcus pneumoniae was isolated f
rom a normally sterile site. Controls were HIV-infected patients of similar
age matched to cases by hospital of admission and CD4 lymphocyte count (<0
.20, 0.20-0.499, greater than or equal to 0.50 x 10(degrees)/L [<200, 200-4
99, greater than or equal to 500 cells/ mm(3)]) or clinical stage of acquir
ed immunodeficiency syndrome. Case and control subjects were restricted to
per sons known to have HIV infection before hospital admission. Analysis us
ed matched univariate and conditional logistic regression.
Results: One hundred seventy-six case patients and 327 controls were enroll
ed. By univariate analysis, persons with pneumococcal disease were more lik
ely to be black, be current smokers, and have close contact with children.
Adjusted for these factors and CD4 cell count, pneumococcal vaccine effecti
veness was 49% (95% confidence interval [CI], 12%-70%). Adjusting for all v
ariables and key interaction terms, vaccine effectiveness among whites was
76% (95% CI, 35%-91%), whereas effectiveness among blacks was 24% (95% CI,
-50% to 61%). Among controls, vaccination was significantly less common amo
ng blacks (29% vs 45%; P<.005).
Conclusions: Pneumococcal vaccine demonstrated protection against invasive
pneumococcal infections among white but not black HIV-infected adults. Fail
ure to demonstrate effectiveness among blacks may be due to limited power b
ecause of low use of the vaccine in this population, immunization at more a
dvanced stages of immunosuppression, or unmeasured factors. These data supp
ort current recommendations for use of pneumococcal vaccine in HIV-infected
persons and highlight a clear need for strategies to improve vaccine-induc
ed protection.