TY - JOUR
T1 - Evaluation of the CHADS2 risk score on short- and long-term all-cause and cardiovascular mortality after syncope
AU - Ruwald, Martin Huth
AU - Ruwald, Anne-Christine
AU - Jons, Christian
AU - Lamberts, Morten
AU - Hansen, Morten Lock
AU - Højgaard, Michael Vinther
AU - Køber, Lars
AU - Torp-Pedersen, Christian
AU - Hansen, Jim
AU - Gislason, Gunnar Hilmar
PY - 2013/5
Y1 - 2013/5
N2 - Background Syncope risk stratification is difficult and has not been implemented clinically. Hypothesis The CHADS2 score can be applied as a risk stratification tool for predicting mortality after an episode of syncope. Methods All patients discharged from emergency departments with a first-time diagnosis of syncope from 2001 to 2009 where identified from nationwide registers in Denmark and matched on sex and age with a control population. Risk of all-cause or cardiovascular death was analyzed by multivariable Cox models. Results A total of 37 705 patients were included. There were a total of 7761 deaths (21%), of which 52% were cardiovascular vs 27 862 (15%) deaths in the control population. The risk of cardiovascular death was significantly increased with increasing CHADS2 score (CHADS2 score: 1-2, hazard ratio [HR]: 9.11, 95% confidence interval [CI]: 8.25-10.07; CHADS2 score: 3-4, HR: 17.32, 95% CI: 15.42-19.47; CHADS2 score: 5-6, HR: 26.66, 95% CI: 21.40-33.21) relative to CHADS2 score of 0. A CHADS2 score of 0 was associated overall with very low event rates (15.1 deaths per 1000 person-years) but was associated with increased relative risk in the syncope population compared to controls. Syncope predicted 1-week, 1-year, and long-term mortality across CHADS2 scores compared to controls but did not reach significance in CHADS2 scores of 5 to 6. Conclusions Increasing CHADS2 score significantly predicts mortality in patients discharged with a diagnosis of syncope, and a CHADS2 score of 0 was associated with a very low absolute mortality. Compared to controls, syncope was associated with increased short- and long-term mortality, particularly in the lower CHADS2 scores.
AB - Background Syncope risk stratification is difficult and has not been implemented clinically. Hypothesis The CHADS2 score can be applied as a risk stratification tool for predicting mortality after an episode of syncope. Methods All patients discharged from emergency departments with a first-time diagnosis of syncope from 2001 to 2009 where identified from nationwide registers in Denmark and matched on sex and age with a control population. Risk of all-cause or cardiovascular death was analyzed by multivariable Cox models. Results A total of 37 705 patients were included. There were a total of 7761 deaths (21%), of which 52% were cardiovascular vs 27 862 (15%) deaths in the control population. The risk of cardiovascular death was significantly increased with increasing CHADS2 score (CHADS2 score: 1-2, hazard ratio [HR]: 9.11, 95% confidence interval [CI]: 8.25-10.07; CHADS2 score: 3-4, HR: 17.32, 95% CI: 15.42-19.47; CHADS2 score: 5-6, HR: 26.66, 95% CI: 21.40-33.21) relative to CHADS2 score of 0. A CHADS2 score of 0 was associated overall with very low event rates (15.1 deaths per 1000 person-years) but was associated with increased relative risk in the syncope population compared to controls. Syncope predicted 1-week, 1-year, and long-term mortality across CHADS2 scores compared to controls but did not reach significance in CHADS2 scores of 5 to 6. Conclusions Increasing CHADS2 score significantly predicts mortality in patients discharged with a diagnosis of syncope, and a CHADS2 score of 0 was associated with a very low absolute mortality. Compared to controls, syncope was associated with increased short- and long-term mortality, particularly in the lower CHADS2 scores.
U2 - 10.1002/clc.22102
DO - 10.1002/clc.22102
M3 - Journal article
C2 - 23450502
SN - 0160-9289
VL - 36
SP - 262
EP - 268
JO - Clinical Cardiology
JF - Clinical Cardiology
IS - 5
ER -