@article {6669, title = {Association between hospitalization for pneumonia and subsequent risk of cardiovascular disease.}, journal = {JAMA}, volume = {313}, year = {2015}, month = {2015 Jan 20}, pages = {264-74}, abstract = {

IMPORTANCE: The risk of cardiovascular disease (CVD) after infection is poorly understood.

OBJECTIVE: To determine whether hospitalization for pneumonia is associated with an increased short-term and long-term risk of CVD.

DESIGN, SETTINGS, AND PARTICIPANTS: We examined 2 community-based cohorts: the Cardiovascular Health Study (CHS, n = 5888; enrollment age, >=65 years; enrollment period, 1989-1994) and the Atherosclerosis Risk in Communities study (ARIC, n = 15,792; enrollment age, 45-64 years; enrollment period, 1987-1989). Participants were followed up through December 31, 2010. We matched each participant hospitalized with pneumonia to 2 controls. Pneumonia cases and controls were followed for occurrence of CVD over 10 years after matching. We estimated hazard ratios (HRs) for CVD at different time intervals, adjusting for demographics, CVD risk factors, subclinical CVD, comorbidities, and functional status.

EXPOSURES: Hospitalization for pneumonia.

MAIN OUTCOMES AND MEASURES: Incident CVD (myocardial infarction, stroke, and fatal coronary heart disease).

RESULTS: Of 591 pneumonia cases in CHS, 206 had CVD events over 10 years after pneumonia hospitalization. CVD risk after pneumonia was highest in the first year. CVD occurred in 54 cases and 6 controls in the first 30 days (HR, 4.07; 95\% CI, 2.86-5.27); 11 cases and 9 controls between 31 and 90 days (HR, 2.94; 95\% CI, 2.18-3.70); and 22 cases and 55 controls between 91 days and 1 year (HR, 2.10; 95\% CI, 1.59-2.60). Additional CVD risk remained elevated into the tenth year, when 4 cases and 12 controls developed CVD (HR, 1.86; 95\% CI, 1.18-2.55). In ARIC, of 680 pneumonia cases, 112 had CVD over 10 years after hospitalization. CVD occurred in 4 cases and 3 controls in the first 30 days (HR, 2.38; 95\% CI, 1.12-3.63); 4 cases and 0 controls between 31 and 90 days (HR, 2.40; 95\% CI, 1.23-3.47); 11 cases and 8 controls between 91 days and 1 year (HR, 2.19; 95\% CI, 1.20-3.19); and 8 cases and 7 controls during the second year (HR, 1.88; 95\% CI, 1.10-2.66). After the second year, the HRs were no longer statistically significant.

CONCLUSIONS AND RELEVANCE: Hospitalization for pneumonia was associated with increased short-term and long-term risk of CVD, suggesting that pneumonia may be a risk factor for CVD.

}, keywords = {Aged, Atherosclerosis, Cardiovascular Diseases, Cohort Studies, Comorbidity, Female, Hospitalization, Humans, Male, Middle Aged, Pneumonia, Risk Factors}, issn = {1538-3598}, doi = {10.1001/jama.2014.18229}, author = {Corrales-Medina, Vicente F and Alvarez, Karina N and Weissfeld, Lisa A and Angus, Derek C and Chirinos, Julio A and Chang, Chung-Chou H and Newman, Anne and Loehr, Laura and Folsom, Aaron R and Elkind, Mitchell S and Lyles, Mary F and Kronmal, Richard A and Yende, Sachin} } @article {6808, title = {Intermediate and long-term risk of new-onset heart failure after hospitalization for pneumonia in elderly adults.}, journal = {Am Heart J}, volume = {170}, year = {2015}, month = {2015 Aug}, pages = {306-12}, abstract = {

BACKGROUND: Pneumonia is associated with high risk of heart failure (HF) in the short term (30 days) postinfection. Whether this association persists beyond this period is unknown.

METHODS: We studied 5,613 elderly (>=65 years) adults enrolled in the Cardiovascular Health Study between 1989 and 1994 at 4 US communities. Participants had no clinical diagnosis of HF at enrollment, and they were followed up through December 2010. Hospitalizations for pneumonia were identified using validated International Classification of Disease Ninth Revision codes. A centralized committee adjudicated new-onset HF events. Using Cox regression, we estimated adjusted hazard ratios (HRs) of new-onset HF at different time intervals after hospitalization for pneumonia.

RESULTS: A total of 652 participants hospitalized for pneumonia during follow-up were still alive and free of clinical diagnosis of HF by day 30 posthospitalization. Relative to the time of their hospitalization, new-onset HF occurred in 22 cases between 31 and 90 days (HR 6.9, 95\% CI 4.46-10.63, P < .001), 14 cases between 91 days and 6 months (HR 3.2, 95\% CI 1.88-5.50, P < .001), 20 cases between 6 months and 1 year (HR 2.6, 95\% CI 1.64-4.04, P < .001), 76 cases between 1 and 5 years (HR 1.7, 95\% CI 1.30-2.12, P < .001), and 71 cases after 5 years (HR 2.0, 95\% CI 1.56-2.58, P < .001). Results were robust to sensitivity analyses using stringent definitions of pneumonia and extreme assumptions for potential informative censoring.

CONCLUSION: Hospitalization for pneumonia is associated with increased risk of new-onset HF in the intermediate and long term. Studies should characterize the mechanisms of this association in order to prevent HF in elderly pneumonia survivors.

}, keywords = {Aged, Disease Progression, Female, Follow-Up Studies, Forecasting, Heart Failure, Hospitalization, Humans, Incidence, Inpatients, Male, Patient Readmission, Pneumonia, Proportional Hazards Models, Retrospective Studies, Risk Assessment, Risk Factors, Time Factors}, issn = {1097-6744}, doi = {10.1016/j.ahj.2015.04.028}, author = {Corrales-Medina, Vicente F and Taljaard, Monica and Yende, Sachin and Kronmal, Richard and Dwivedi, Girish and Newman, Anne B and Elkind, Mitchell S V and Lyles, Mary F and Chirinos, Julio A} }