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Table 2 Comparison of 4-min RAP-values between Signals 1 and 2

From: The effect of baseline pressure errors on an intracranial pressure-derived index: results of a prospective observational study

PatID

N (4-min RAP observations)

RAP (average + std)

Differences in RAP between Signals 1 and 2 (N,%)

  

Signal 1

Signal 2

0.2

0.4

0.6

1

1,850

0.23 ± 0.43

0.26 ± 0.42

483 (26%)

147 (8%)

51 (3%)

2

1,090

0.15 ± 0.36

-0.01 ± 0.36

612 (56%)

338 (31%)

179 (16%)

3

4,706

0.61 ± 0.33

0.62 ± 0.32

365 (8%)

72 (2%)

30 (1%)

4

2,119

0.36 ± 0.38

0.36 ± 0.38

200 (9%)

29 (1%)

8

5

1,651

0.60 ± 0.35

0.61 ± 0.35

53 (3%)

11 (1%)

3

6

1,119

0.42 ± 0.35

0.43 ± 0.35

187 (17%)

54 (5%)

10 (1%)

7

3,209

0.65 ± 0.30

0.68 ± 0.28

236 (7%)

83 (3%)

35 (1%)

8

3,747

0.51 ± 0.39

0.35 ± 0.41

1,311 (35%)

806 (22%)

456 (12%)

9

4,221

0.53 ± 0.40

0.61 ± 0.34

982 (23%)

506 (12%)

323 (8%)

10

3,538

0.25 ± 0.33

0.26 ± 0.33

166 (5%)

20 (1%)

11

11

1,494

0.62 ± 0.32

0.63 ± 0.31

54 (4%)

14 (1%)

4

12

3,089

0.83 ± 0.24

0.83 ± 0.25

19 (1%)

3

2

13

1,381

0.28 ± 0.34

0.32 ± 0.35

413 (30%)

113 (8%)

26 (2%)

14

2,093

0.38 ± 0.34

0.37 ± 0.35

254 (12%)

72 (3%)

31 (1%)

15

5,522

0.52 ± 0.36

0.50 ± 0.37

729 (13%)

142 (3%)

28 (1%)

16

2,824

0.38 ± 0.36

0.39 ± 0.36

393 (14%)

73 (3%)

15 (1%)

  1. RAP: correlation coefficient (R) between the intracranial pressure (ICP) wave amplitude (A) and the mean ICP level (P).