TY - JOUR
T1 - Effect of algorithm-based therapy vs usual care on clinical success and serious adverse events in patients with staphylococcal bacteremia a randomized clinical trial
AU - the Staphylococcal Bacteremia Investigators
AU - Holland, Thomas L.
AU - Raad, Issam
AU - Boucher, Helen W.
AU - Anderson, Deverick J.
AU - Cosgrove, Sara E.
AU - Suzanne Aycock, P.
AU - Baddley, John W.
AU - Chaftari, Anne Marie
AU - Chow, Shein Chung
AU - Chu, Vivian H.
AU - Carugati, Manuela
AU - Cook, Paul
AU - Ralph Corey, G.
AU - Crowley, Anna Lisa
AU - Daly, Jennifer
AU - Gu, Jiezhun
AU - Hachem, Ray
AU - Horton, James
AU - Jenkins, Timothy C.
AU - Levine, Donald
AU - Miro, Jose M.
AU - Pericas, Juan M.
AU - Riska, Paul
AU - Rubin, Zachary
AU - Rupp, Mark E.
AU - Schrank, John
AU - Sims, Matthew
AU - Wray, Dannah
AU - Zervos, Marcus
AU - Fowler, Vance G.
N1 - Funding Information:
Funding/Support: This research was funded by
Publisher Copyright:
© 2018 American Medical Association. All rights reserved.
PY - 2018/9/25
Y1 - 2018/9/25
N2 - IMPORTANCE The appropriate duration of antibiotics for staphylococcal bacteremia is unknown. OBJECTIVE To test whether an algorithm that defines treatment duration for staphylococcal bacteremia vs standard of care provides noninferior efficacy without increasing severe adverse events. DESIGN, SETTING, AND PARTICIPANTS A randomized trial involving adults with staphylococcal bacteremia was conducted at 16 academic medical centers in the United States (n = 15) and Spain (n = 1) from April 2011 to March 2017. Patients were followed up for 42 days beyond end of therapy for those with Staphylococcus aureus and 28 days for those with coagulase-negative staphylococcal bacteremia. Eligible patients were 18 years or older and had 1 or more blood cultures positive for S aureus or coagulase-negative staphylococci. Patients were excluded if they had known or suspected complicated infection at the time of randomization. INTERVENTIONS Patients were randomized to algorithm-based therapy (n = 255) or usual practice (n = 254). Diagnostic evaluation, antibiotic selection, and duration of therapy were predefined for the algorithm group, whereas clinicians caring for patients in the usual practice group had unrestricted choice of antibiotics, duration, and other aspects of clinical care. MAIN OUTCOMES AND MEASURES Coprimary outcomes were (1) clinical success, as determined by a blinded adjudication committee and tested for noninferiority within a 15% margin; and (2) serious adverse event rates in the intention-to-treat population, tested for superiority. The prespecified secondary outcome measure, tested for superiority, was antibiotic days among per-protocol patients with simple or uncomplicated bacteremia. RESULTS Among the 509 patients randomized (mean age, 56.6 [SD, 16.8] years; 226 [44.4%] women), 480 (94.3%) completed the trial. Clinical success was documented in 209 of 255 patients assigned to algorithm-based therapy and 207 of 254 randomized to usual practice (82.0% vs 81.5%; difference, 0.5% [1-sided 97.5% CI, −6.2% to ]). Serious adverse events were reported in 32.5% of algorithm-based therapy patients and 28.3% of usual practice patients (difference, 4.2% [95% CI, −3.8% to 12.2%]). Among per-protocol patients with simple or uncomplicated bacteremia, mean duration of therapy was 4.4 days for algorithm-based therapy vs 6.2 days for usual practice (difference, −1.8 days [95% CI, −3.1 to −0.6]). CONCLUSIONS AND RELEVANCE Among patients with staphylococcal bacteremia, the use of an algorithm to guide testing and treatment compared with usual care resulted in a noninferior rate of clinical success. Rates of serious adverse events were not significantly different, but interpretation is limited by wide confidence intervals. Further research is needed to assess the utility of the algorithm.
AB - IMPORTANCE The appropriate duration of antibiotics for staphylococcal bacteremia is unknown. OBJECTIVE To test whether an algorithm that defines treatment duration for staphylococcal bacteremia vs standard of care provides noninferior efficacy without increasing severe adverse events. DESIGN, SETTING, AND PARTICIPANTS A randomized trial involving adults with staphylococcal bacteremia was conducted at 16 academic medical centers in the United States (n = 15) and Spain (n = 1) from April 2011 to March 2017. Patients were followed up for 42 days beyond end of therapy for those with Staphylococcus aureus and 28 days for those with coagulase-negative staphylococcal bacteremia. Eligible patients were 18 years or older and had 1 or more blood cultures positive for S aureus or coagulase-negative staphylococci. Patients were excluded if they had known or suspected complicated infection at the time of randomization. INTERVENTIONS Patients were randomized to algorithm-based therapy (n = 255) or usual practice (n = 254). Diagnostic evaluation, antibiotic selection, and duration of therapy were predefined for the algorithm group, whereas clinicians caring for patients in the usual practice group had unrestricted choice of antibiotics, duration, and other aspects of clinical care. MAIN OUTCOMES AND MEASURES Coprimary outcomes were (1) clinical success, as determined by a blinded adjudication committee and tested for noninferiority within a 15% margin; and (2) serious adverse event rates in the intention-to-treat population, tested for superiority. The prespecified secondary outcome measure, tested for superiority, was antibiotic days among per-protocol patients with simple or uncomplicated bacteremia. RESULTS Among the 509 patients randomized (mean age, 56.6 [SD, 16.8] years; 226 [44.4%] women), 480 (94.3%) completed the trial. Clinical success was documented in 209 of 255 patients assigned to algorithm-based therapy and 207 of 254 randomized to usual practice (82.0% vs 81.5%; difference, 0.5% [1-sided 97.5% CI, −6.2% to ]). Serious adverse events were reported in 32.5% of algorithm-based therapy patients and 28.3% of usual practice patients (difference, 4.2% [95% CI, −3.8% to 12.2%]). Among per-protocol patients with simple or uncomplicated bacteremia, mean duration of therapy was 4.4 days for algorithm-based therapy vs 6.2 days for usual practice (difference, −1.8 days [95% CI, −3.1 to −0.6]). CONCLUSIONS AND RELEVANCE Among patients with staphylococcal bacteremia, the use of an algorithm to guide testing and treatment compared with usual care resulted in a noninferior rate of clinical success. Rates of serious adverse events were not significantly different, but interpretation is limited by wide confidence intervals. Further research is needed to assess the utility of the algorithm.
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U2 - 10.1001/jama.2018.13155
DO - 10.1001/jama.2018.13155
M3 - Article
C2 - 30264119
AN - SCOPUS:85053766358
SN - 0098-7484
VL - 320
SP - 1249
EP - 1258
JO - JAMA - Journal of the American Medical Association
JF - JAMA - Journal of the American Medical Association
IS - 12
ER -