Development and validation of a nomogram for predicting postoperative pulmonary complications in older patients undergoing noncardiac thoracic surgery: a prospective, bicentric cohort study

Table 2 Postoperative LOS, ICU admission, and mortality according to the number of PPCs

	No.of PPCs
	0	1	2–3	≥4	Total
No. (%) of patients	1251 (65.9)	301 (15.9)	266 (14)	80 (4.2)	1898 (100)
Postoperative LOS, median (10–90^th percentile), d^*	7 (4–15)	9 (7–15)	15 (8–19)	21 (9.4–21.6)	8 (4–18)
ICU-admission, n (%)^†	8/1251 (1.4)	12/301 (4)	23/266 (8.6)	18/80 (22.5)	61/1898 (3.2)
30-day mortality, n (%)^†‡	1/1247 (0.1)	1/299 (0.3)	5/266 (1.9)	5/80 (6.3)	12/1892 (0.6)
90-day mortality, n (%)^†‡	1/1231 (0.1)	2/291 (0.7)	5/264 (1.9)	8/76 (10.5)	16/1862 (0.9)

^*Kruskal-Wallis test for comparing medians across four groups, P<0.001; ^†Mantel– Haenszel test for assessing the trend across the four groups, P<0.001; ^‡Missing values were 6 (0.3%) for 30-day mortality and 36 (1.9%) for 90-day mortality in the overall cohort
PPCs, a composite outcome in which one or more postoperative pulmonary complications might be observed, LOS length of hospital stay, ICU intensive care unit

ISSN: 1471-2318