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Table 3 Pearson product-moment correlation coefficients between different measured variables

From: Cardiac output in idiopathic normal pressure hydrocephalus: association with arterial blood pressure and intracranial pressure wave amplitudes and outcome of shunt surgery

Patient number Number of 6s recordings CO/MWAABP CO/MWAICP MWAABP/MWAICP Management group Outcome Category
1 3,370 0.55c -0.11c 0.09c B C
2 12,388 0.54c -0.12c -0.22c A NR
3 4,776 0.08c 0.08c 0.32c A C
4 10,627 0.31c 0.09c 0.01 A R
5 6,562 0.66c -0.18c -0.22c A R
6 7,627 0.52c -0.24c -0.29c A R
7 6,081 0.25c -0.18c -0.14c A R
8 8,501 0.87c 0.23c 0.23c B NR
9 8,172 0.85c 0.37c 0.35c B NR
10 1,022 0.25c -0.003 0.14c A R
11 10,715 0.63c 0.18c 0.26c A R
12 4,519 0.60c -0.08c 0.003 B C
13 6,089 0.80c -0.04a 0.04a A R
14 8,518 0.12c -0.19c 0.23c A NR
15 8,202 0.59c -0.03a 0.05c A R
16 7,030 0.14c -0.05c 0.21c A R
17 3,538 0.25c -0.12c -0.15c B C
18 8,239 0.58c -0.07c -0.07c A R
19 7,416 0.44c 0.005 0.18c B C
20 8,117 0.04c -0. 08c 0.21c A R
21 5,476 0.02 -0.17c 0.18c A R
22 8,991 0.09c 0.39c 0.07c B C
23 6,441 0.42c -0.12c -0.07c A R
24 9,478 0.15c -0.02 0.04c A R
25 9,143 0.29c 0.07c 0.24c B NR
26 5,291 0.12c -0.13c -0.03a A NR
27 6,409 0.73c 0.21c 0.23c A R
28 6,467 0.61c 0.11c 0.06c B C
29 8,311 0.57c 0.15c 0.10c A R
Median 7,416 0.44 -0.04 0.07   
Ranges 1,022 - 12,388 0.02 - 0.87 -0.24 - 0.39 -0.29 - 0.35   
  1. CO: mean cardiac output; MWAABP: mean arterial blood pressure wave amplitude; MWAICP: mean intracranial pressure wave amplitude. Significance: aP < 0.05; bP < 0.01; cP < 0.001 (Pearson correlation coefficient for each individual patient recording). C: Conservative management; NR: Surgical Non-Responder; R: Responder.