Table 4 Reporting of potential clinical confounders
From: Heart rate variability in critical care medicine: a systematic review
Author | Year | Comorbidities | Drugs | Mechanical ventilation (% patients) | Sedation (% patients) | Catecholamines (% patients) | Feeding | HR/RR reported |
|---|---|---|---|---|---|---|---|---|
Annane | 1999 | Excluded | – | 100% | 0% | 0% | – | HR/RR |
Korach | 2001 | – | – | 41.5%. | 19.5% | 12.20% | – | – |
Barnaby | 2002 | – | – | 0% | – | 0% | – | HR/RR |
Pontet | 2003 | Excluded | Excluded | 38.5% | – | 17.90% | – | HR |
Shen | 2003 | + | + | 100% | 0% | 0% | – | HR/RR |
Schmidt | 2005 | – | – | 71% | 61% | 62% | – | – |
Papaioannou | 2006 | + | – | – | + | – | – | – |
Bourgault | 2006 | Excluded | Excluded | 100% | 33% | 0% | – | HR |
Chen | 2007 | Excluded/+ | – | – | – | 0% | – | HR/RR |
Passriello | 2007 | + | + | – | – | – | – | HR |
Chen | 2008 | + | – | 0% | – | – | – | HR |
Aboab | 2008 | Excluded | – | 100% | 80.9% | 100% | – | HR |
Nogueira | 2008 | Excluded | – | 100% | – | 100% | – | RR |
Papaioannou | 2009 | – | Excluded | 100% | 100% | – | – | – |
Tiainen | 2009 | + | – | 100% | 100% | 87% | – | HR |
Schmidt 0 | 2010 | + | – | 88% | 89% | 74% | – | – |
Kasaoka 1 | 2010 | – | – | 100% | 100% | – | – | – |
Chen | 2012 | + | – | OHCA 100%, SS + MV 100%, SS 0%, S 0% | OHCA 81, SS + MV 63%, SS 59%, S 0% | OHCA 100%, SS + MV 9%, SS 18.8%, S 0% | – | HR |
Gomez Duque | 2012 | Excluded/+ | – | – | – | 72% | – | – |
Brown | 2013 | – | – | – | – | 63% | – | HR |
Green | 2013 | – | – | 90.90% | + | 78.80% | – | HR |
Wieske | 2013 | Excluded/+ | + | + | + | + | – | HR |
Wieske | 2013 | Excluded/+ | – | 100% | – | – | – | – |
Bradley | 2013 | – | – | + | + | + | – | HR |
Huang | 2014 | Excluded/+ | Excluded/+ | 100% | – | – | – | RR |
Zhang | 2014 | – | – | – | – | 12% | – | – |
Schmidt | 2014 | – | + | 89.2% | 72.3% | 72.3% | – | HR |
Tang | 2014 | + | + | – | – | – | – | HR |
Zaal | 2015 | Excluded | Excluded | 60% | 20% | 0% | – | – |
Hammash | 2015 | Excluded/+ | – | 100% | – | – | – | – |
Nagaraj | 2016 | – | – | 100% | 100% | – | – | HR |