The CCS assigns many infectious
conditions to a first-level organ system category rather Dasatinib order than to the infectious category. Additional CCS levels were used to reassign the following to the infectious category: central nervous system infection; infection of the eye; otitis media; endocarditis; respiratory infection; intestinal infection; anal and rectal conditions; peritonitis and intestinal abscess; urinary tract infections; inflammatory conditions of the genitals; skin and subcutaneous tissue infections; infective arthritis and osteomyelitis; infection and inflammation of an internal prosthesis; postoperative infection. Finally, a separate category for ADI was generated, and appropriate admissions were reassigned according
to individual ICD-9 codes [20]. Any non-first admission for bacterial pneumonia (ICD-9 codes ≥481 and <483) was categorized as an ADI. IRIS was defined according to established criteria [21,22] as signs or symptoms that were consistent with an inflammatory and/or atypical presentation of an OI or malignancy, were not medication side effects, and occurred in a virological responder within 6 months of HAART initiation. The pathogen or process had to be identified microbiologically or histopathologically. Seliciclib cost To determine IRIS hospitalizations, chart abstraction specifically for IRIS was undertaken on records of all virological responders admitted within 6
months of HAART initiation. For purposes of analysis, all IRIS cases were considered ADIs. Baseline characteristics of responders and nonresponders were compared using the χ2 or Wilcoxon rank-sum test. Negative binomial regression was used to examine hospitalization rates, which were calculated per 100 person-years (PY) by dividing number of hospital admissions within a time period for each subject by accrued person-time based on the exact day of a subject’s entry or exit into observation. Crude hospitalization rates for responders and nonresponders in various time periods were estimated in a regression model which included response status, time periods before (the 180 days prior) and after initiation (1–45, 46–90, 91–180 and 181–365 days) and the interaction Thymidylate synthase terms between these variables. Each baseline exposure was evaluated with bivariate regression. The final multivariate model included all exposure variables for which the bivariate P was <0.2. A population-averaged approach employing generalized estimating equations was used to estimate regression coefficients and obtain robust standard errors adjusted for the correlated nature of repeated admissions among patients [23]. P-values <0.05 were considered statistically significant. stata 10.0 (StataCorp LP, College Station, TX, USA) was used for all analyses [24].
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