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Table 1 PaO2 and PaCO2 values recorded at the four times

From: Does Tendelenburg position and sheet covering of the face affect respiratory function in cardiac patient?

Times   1 2 3 4
PaO2 A1 111.9± 28 147.2 ± 41* 157± 42 116 ± 25*
  A2 78.6 ± 8 78.1 ± 8 82.7 ± 9 78.7 ± 14
  B1 97.8 ± 17 146.5 ± 33* 156.6 ± 40 102.5 ± 13*
  B2 87.9 ± 19 82 ± 12 88.2 ± 10 86.7 ± 10
  C 144.8 ± 27 208.7 ± 35* 233.7 ± 37* 152.2 ± 31*
PaCO2 A1 40.1 ± 4 40.3 ± 4 41.2 ± 4 40 ± 5
  A2 40.9 ± 3 41.3 ± 4 41.1 ± 5 41.1 ± 5
  B1 40.1 ± 5 41.6 ± 5 43.6 ± 6 43.8 ± 7
  B2 38.9 ± 4 40.8 ± 4 40.6 ± 5 38.5 ± 3
  C 36.3 ± 6 37 ± 5 36.3 ± 4 35.6 ± 5
  1. *P < 0.05 versus the previous value within each group