Table 4 The result of the two-piecewise linear regression model.

From: Serum calcium is associated with sudden cardiac arrest in stroke patients from ICU: a multicenter retrospective study based on the eICU collaborative research database

Stroke patients

OR, 95% CI

P

Inflection points of serum calcium (mg/dL) per 1-unit increase

8.2 and 10.4

 

 ≤ 8.2

0.53 (0.42, 0.67)

 < 0.0001

 8.2–10.4

1.29 (0.99, 1.67)

0.0584

 > 10.4

2.37 (1.58, 3.57)

 < 0.0001

P-value for likelihood ratio test

 

 < 0.0001

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