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Table 5 Urinary vanilmandelic acid concentrations (μg/mg)

From: The effects of different weaning modes on the endocrine stress response

Group Initial Weaning 48 hours extubation
Pressure support 16 ± 8 14.6 ± 9.7* 17.3 ± 6.9
CPAP 14.6 ± 7.3 14 ± 7.6 19 ± 11**
T-piece 15 ± 8 35.5 ± 12.4***,†,‡ 28 ± 10.6***,†,‡
  1. *P < 0.05, **P < 0.01, ***P < 0.001, when compared with the initial level within the group. P < 0.001, pressure support group compared with T-piece group. P < 0.001, continuous positive airway pressure (CPAP) group compared with T-piece group.