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Table 4 Risk factors in patients with VAE compared with patients with VAP in all included studies

From: Does ventilator-associated event surveillance detect ventilator-associated pneumonia in intensive care units? A systematic review and meta-analysis

  Studies (n) Patients with VAE (n) Patients with VAP (n) Estimate (OR/WMD) 95 % Confidence interval (%) Heterogeneity Publication biasc Effect model
I 2 (%) P t value (Egger’s test) P
VAC
 Age 1 37 121 0.00a −5.89, 5.89 NA NA NA NA NA
 Sex (male/female) 3 551 255 0.85b 0.59, 1.21 20.60 0.28 −2.68 0.24 Fixed
 APACHE 1 387 83 5.00a −1.67, 11.67 NA NA NA NA NA
 Ventilated duration (days) 3 569 299 −2.79a −4.79, −0.80 0.00 0.81 −3.39 0.18 Fixed
 Death in hospital 5 857 393 1.49b 1.11, 2.01 53.10 0.07 −1.37 0.27 Fixed
 Length of stay (days)
  In hospital 4 1244 329 −4.27a −7.00, −1.55 47.40 0.13 0.20 0.94 Fixed
  In ICU 2 802 81 −0.64a −5.84, 4.55 74.50 0.05 NA NA Random
IVAC
 Age 1 31 121 0.00a −6.63, 6.63 NA NA NA NA NA
 Sex (male/female) 3 406 268 1.05b 0.70, 1.59 0.00 0.46 0.29 0.82 Fixed
 APACHE 1 344 83 4.00a −2.53, 10.53 NA NA NA NA NA
 Ventilated duration (days) 2 384 248 −2.89a −5.58, −0.20 0.00 0.80 NA NA Fixed
 Death in hospital 4 446 423 1.76b 1.23, 2.52 0.00 0.77 0.50 0.67 Fixed
 Length of stay (days)
  In hospital 2 384 248 −5.86a −9.46, −2.25 0.00 0.92 NA NA Fixed
  In ICU 0 0 0 NA NA NA NA NA NA NA
  1. aEstimate refers to weighted mean difference (WMD). bEstimate refers to odds ratio (OR). cEgger’s test was used to estimate publication bias in meta-analyses containing more than two individual studies. VAE ventilator-associated conditions (including ventilator-associated conditions (VAC), infection-related ventilated-associated conditions (IVAC), possible ventilator-associated pneumonia (VAP), and probable VAP), APACHE acute physiology and chronic health evaluation, NA not available