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Table 1 Maximum methemoglobin fraction and hemoglobin concentration during each session of extended hemodialysis/hemodiafiltration between 1 February 2008 and 31 January 2009

From: Methemoglobinemia in critically ill patients during extended hemodialysis and simultaneous disinfection of the hospital water supply

  Extended hemodialysis/hemodiafiltration on days with water disinfection Extended hemodialysis/hemodiafiltration on disinfection-free days P
Number of sessions 34 207  
Methemoglobin fraction (%) 5.9 (1.3; 8.4) 1.0 (0.8; 1.2) < 0.001
Hemoglobin concentration (g/dl) 9.8 ± 0.9 10.3 ± 1.1 0.01
  1. Data are reported as median (25th; 75th percentiles) or as mean ± standard deviation.