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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