Table 5

Urinary vanilmandelic acid concentrations (μg/mg)

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***^,†,‡

*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.

Koksal et al. Critical Care 2004 8:R31   doi:10.1186/cc2413