Table 3 The pooled RR values under various APACHE II scores

APACHE II ≤ 13

3

399

0.81 [0.53, 1.26]

0.36

APACHE II > 13

9

1996

0.82 [0.71, 0.94]

0.006

APACHE II ≤ 15

5

498

0.74 [0.51, 1.07]

0.11

APACHE II > 15

7

1897

0.83 [0.72, 0.96]

0.01

APACHE II ≤ 17

7

695

0.63 [0.47, 0.86]

0.003

APACHE II > 17

5

1700

0.88 [0.76, 1.03]

0.10

APACHE II ≤ 19

8

743

0.64 [0.47, 0.86]

0.003

APACHE II > 19

4

1652

0.88 [0.76, 1.03]

0.11

APACHE II ≤ 13

4

419

0.82 [0.55, 1.24]

0.36

13 < APACHE II ≤ 17

3

276

0.46 [0.29, 0.74]

0.001

APACHEII > 17

5

1700

0.88 [0.76, 1.03]

0.10

Total

12

2395

0.82 [0.71, 0.94]

0.004