Table 3

Comparison of intracranial pressure depressions of different levels and durations in the different groups of patients

Awake stateAsleep state
−10 mm Hg−5 mm Hg−10 mm Hg−5 mm Hg
Duration of ICP elevationsManagement groupsN (%)Median (range)N (%)Median (range)N (%)Median (range)N (%)Median (range)
Numbers of ICP reductions during a standardised recording time of 10 hours presented as median numbers with ranges in parentheses.
 *p < 0.05 (Mann–Whitney test). No ICP reductions in group 3.
 ICP, intracranial pressure.
 Group 1, “normal” mean ICP; group 2, “low” mean ICP; group 3, “high” mean ICP.
0.5 minGroup 110 (22)11 (1 to 257)21 (46)47 (1 to 508)11 (1 to 1)9 (20)2 (1 to 19)
Group 26 (43)63 (10 to 803)10 (71)252 (17 to 826)*2 (14)3 (2 to 4)5 (36)4 (1 to 319)
1 minGroup 17 (15)8 (1 to 149)15 (33)96 (1 to 284)6 (13)3 (1 to 11)
Group 26 (43)32 (4 to 509)9 (64)150 (39 to 512)2 (14)3 (3 to 3)3 (21)21 (2 to 198)
5 minGroup 1314 (13 to 50)11 (24)27 (4 to 87)
Group 25 (36)3 (1 to 137)9 (64)30 (3 to 137)2 (14)33 (4 to 61)