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Table 2 Details of included studies

From: Patient centred variables with univariate associations with unplanned ICU admission: a systematic review

Ref Lead Author Publication year Total number of patients in study Patients in ICU group Country No of sites Bias scores (high (HQ), medium (MQ) or low quality (LQ))
[16] Barfod 2012 6279 102 Denmark 1 5 - MQ
[17] Calzavacca 2012 95 15 Australia 1 2 - LQ
[18] Churpek 2013 59,643 2638 USA 1 7 - HQ
[19] Eick 2015 5730 366 Germany 1 4 - LQ
[20] Escobar 2012 102,488 3525 USA 14 7 - HQ
[21] Frost 2009 126,826 1582 Australia 1 7 - HQ
[22] Hong 2011 1025 201 Singapore 1 4 - LQ
[23] Hunziker 2012 74,784 5233 USA 1 5 - MQ
[24] Loekiko 2013 70,829 149 Australia 2 5 - MQ
[25] Schuetz 2015 7000 490 Swiss, France, USA 3 5 - MQ
[26] Steiner 2016 2407 93 Switzerland 1 4 - LQ
[27] Sudarshan 2015 527 42 USA 1 3 - LQ
[28] Tam 2008 94,482 672 Australia 1 7 - HQ
[29] Tsai 2014 1049 313 Taiwan 1 7 - HQ
[30] Tsai 2014 699 214 Taiwan 1 7 - HQ
[31] Wunderink 2012 214 71 USA 1 3 - LQ