Table 1 Baseline characteristics and initial hospital outcomes stratified by unexpected ICU admission status

Baseline characteristics

Standardized difference ^a

Age, mean (± SD)

76.5 (5.0)

78.9 (5.0)

76.5 (4.9)

0.08

Age group, n (%)

 70–74

6,960 (42.0)

590 (39.3)

6,370 (42.3)

0.06

 75–79

5,279 (31.9)

469 (31.2)

4,810 (31.9)

0.02

 80–84

3,075 (18.6)

320 (21.3)

2,755 (18.3)

0.08

 ≥ 85

1,246 (7.5)

124 (8.3)

1,122 (7.5)

0.03

Female, n (%)

7,195 (43.4)

613 (40.8)

6,582 (43.7)

0.06

Income quintile, n (%)

 1–lowest

3,065 (18.5)

289 (19.2)

2,776 (18.4)

0.02

 2

3,483 (21.0)

304 (20.2)

3,179 (21.1)

0.02

 3

3,261 (19.7)

304 (20.2)

2,957 (19.6)

0.01

 4

3,284 (19.8)

292 (19.4)

2,992 (19.9)

0.01

 5–highest

3,435 (20.7)

311 (20.7)

3,124 (20.7)

 < 0.01

Rural residence, n (%)

1,955 (11.8)

176 (11.7)

1,779 (11.8)

 < 0.01

High comorbidity burden, n (%)

6,973 (42.1)

677 (45.0)

6,296 (41.8)

0.07

Frailty, n (%)

1,181 (7.1)

140 (9.3)

1,041 (6.9)

0.09

Cancer type, n (%)

 GI

11,620 (70.2)

1,115 (74.2)

10,505 (69.8)

0.10

 GU

1,835 (11.1)

108 (7.2)

1,727 (11.5)

0.15

 BP

3,105 (18.8)

280 (18.6)

2,825 (18.8)

 < 0.01

Procedure

 Colectomy

9,408 (56.8)

743 (49.4)

8,665 (57.5)

0.16

 Nephroureterectomy

1,743 (10.5)

100 (6.7)

1,643 (10.9)

0.15

 Lobectomy

3,000 (18.1)

257 (17.1)

2,743 (18.2)

0.03

 Other

2,409 (14.5)

403 (26.8)

2,006 (13.3)

0.34

Stage, n (%)

 1

2,432 (14.7)

174 (11.6)

2,258 (15.0)

0.10

 2

4,568 (27.6)

429 (28.5)

4,139 (27.5)

0.02

 3

5,670 (34.2)

481 (32.0)

5,189 (34.5)

0.05

 4

1,992 (12.0)

192 (12.8)

1,800 (12.0)

0.02

 Missing

1,898 (11.5)

227 (15.1)

1,671 (11.1)

0.12

Neo-adjuvant therapy, n (%)

1,487 (9.0)

145 (9.6)

1,342 (8.9)

0.03

Diagnosis in 2013 or later, n (%)

9,660 (58.3)

817 (54.3)

8,843 (58.7)

0.09

Characteristics of the initial hospitalization

p-value

ICU admission, n (%)

4,451 (26.9)

1,503 (100)

2,948 (19.6)

 < 0.001

Mechanical ventilation, n (%)

1,050 (69.9)

1,050 (69.9)

–

–

Duration of mechanical ventilation (days), n (%)

 0

15,510 (93.7)

453 (30.1)

15,057 (100)

 < 0.001

 1–2

321 (21.4)

321 (21.4)

–

 3–7

652 (43.4)

652 (43.4)

–

 8–14

53 (3.5)

53 (3.5)

–

 > 14

24 (1.6)

24 (1.6)

–

Hospital length of stay (days), median (IQR)

8 (5–11)

13 (9–21)

7 (5–10)

 < 0.001

Hospital disposition, n (%)

 Home without homecare

9,448 (57.1)

782 (52.0)

8,911 (59.2)

 < 0.001

 Home with homecare

6,519 (39.4)

537 (35.7)

5,737 (38.1)

 Inpatient rehab

525 (3.2)

174 (11.6)

351 (2.3)

 Nursing home

62 (0.4)

7 (0.5)

55 (0.4)