Table 1 Characteristics of studies included in this meta-analysis
First author/year of publication | Country | Sex (M/F) | Age in y (mean ± SD) | Cases | Tidal volume (ml/kg) | Index test | Reference standard measurement | Reference standard threshold | Reference standard device |
|---|---|---|---|---|---|---|---|---|---|
Barbier 2004 [14] | France | 15/5 | 63 ± 15 | 20 | 8.5 | (Dmax – Dmin)/Dmin | CI | > 15% | TTE |
Feissel 2004 [15] | United States | 22/17 | 65 ± 15 | 39 | 8–10 | (Dmax – Dmin)/[(Dmax + Dmin)/2] | CO | > 15% | TTE |
Charbonneau 2014 [16] | France | 26/18 | 58.5 | 44 | 8–10 | (Dmax – Dmin)/Dmin | CI | > 15% | TTE |
Theerawit 2016 [17] | Thailand | 11/18 | 62.6 ± 15.9 | 29 | 8 | (Dmax – Dmin)/[(Dmax + Dmin)/2] | CO | > 15% | PCA |
Lu 2017 [18] | China | 33/16 | R: 55.7 ± 12.6 N: 55 ± 12.8 | 49 | 8–10 | (Dmax – Dmin)/Dmin | CI | ≥ 10% | TTE |
Vignon 2017 [19] | France | 379/161 | 65 ± 13 | 540 | 8 | (Dmax – Dmin)/Dmin | SV | > 10% | TTE |