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Table 2 Spearman’s coefficient analysis between nurse and pupillometer for pupil size evaluation

From: Reliability of standard pupillometry practice in neurocritical care: an observational, double-blinded study

Pupil size (mm)

n

Nurses’ estimationsa (mm)

Pupillometer measurementsa (mm)

P value

Spearman's coefficient (95 % CI)

P value

<2

61

2 (2–2)

1.8 (1.6–1.8)

0.057

0.39 (0.15–0.59)

0.002

2–4

232

3 (2–3)

2.8 (2.5–3.3)

0.005

0.44 (0.33–0.54)

<0.001

>4

113

4 (3–5)

4.9 (4.4–5.6)

<0.001

0.37 (0.19–0.51)

0.001

All

406

3 (2–4)

3.0 (2.3–4.3)

<0.001

0.75 (0.71–0.79)

<0.001

  1. aData presented as median (interquartile range)
  2. CI confidence interval