. 2022 Apr 12;11(8):e023837. doi: 10.1161/JAHA.121.023837

Table 4.

Risk Intervals of POH Based on the Nomogram

Risk intervals	Low risk (<282 points)	Medium risk (282–315 points)	High risk (>315 points)
Estimated probability, %	<10	10–40	>40
Observed probability, % (95% CI)	5.1 (4.5–5.8)	20.2 (19.2–21.2)	63.1 (61.3–64.9)
No. of patients (%)	4983 (37.1)	5687 (42.3)	2770 (20.6)

Risk intervals

Low risk

(<282 points)

Medium risk

(282–315 points)

High risk

(>315 points)

Estimated probability, %

<10

10–40

>40

Observed probability, % (95% CI)

5.1 (4.5–5.8)

20.2 (19.2–21.2)

63.1 (61.3–64.9)

No. of patients (%)

4983 (37.1)

5687 (42.3)

2770 (20.6)

POH indicates postoperative headache.