Table 3 Outcomes in the pre-match and matched samples

Variable

Before propensity score matching

After propensity score matching

SCU

(n = 7,660)

ICU

(n = 1,023)

OR

(95% CI)

P-value

SCU

(n = 960)

ICU

(n = 960)

OR

(95% CI)

P-value

In-hospital mortality

208 (2.7)

87 (8.5)

3.33 (2.57–4.31)

 < 0.001

57 (5.9)

76 (7.9)

1.36 (0.95–1.9)

0.106

mRS ≤ 1 at discharge

2,751 (35.9)

272 (26.6)

0.65 (0.56–0.75)

 < 0.001

291 (30.3)

256 (26.6)

0.84 (0.69–1.02)

0.077

mRS ≤ 2 at discharge

4,305 (56.2)

426 (41.6)

0.56 (0.49–0.63)

 < 0.001

435 (45.3)

403(42.0)

0.87 (0.73–1.05)

0.141

mRS ≤ 3 at discharge

5,394 (70.4)

573 (56.0)

0.53 (0.47–0.61)

 < 0.001

562 (58.5)

543 (56.6)

0.92 (0.77–1.11)

0.381

mRS = 4 at discharge

1,369 (17.9)

235 (23.0)

0.73 (0.62–0.85)

 < 0.001

191 (19.9)

223 (23.2)

0.82 (0.66–1.02)

0.075

mRS = 5 at discharge

699 (9.1)

130 (12.7)

0.69 (0.56–0.84)

 < 0.001

154 (16.0)

120 (12.5)

1.34 (1.03–1.73)

0.0265

mRS = 4, 5 or 6 at discharge

2,266 (29.5)

450 (44.0)

0.53 (0.47–0.61)

 < 0.001

397 (41.3)

417 (43.4)

0.91 (0.77–1.10)

0.3557

SCU

(n = 7,660)

ICU

(n = 1,023)

Difference in mean

(95% CI)

P-value

SCU

(n = 960)

ICU

(n = 960)

Difference in mean

(95% CI)

P-value

LOS (SD), days

18.6 (15.5)

26.5 (20.7)

7.9 (6.7–9.3)

 < 0.001

20.9 (15.8)

26.2 (19.1)

5.2 (3.7–6.8)

 < 0.001

Expense (SD), yen

1,305,616 (844,992)

2,051,805 (1,266,781)

746,090 (666,105–826,074)

 < 0.001

1,686,588 (1,047,943)

1,998,260 (1,250,707)

311,672 (208,387–414,956)

 < 0.001