BNP (Average #, SEM, n)

Surgical (n = 38)

Medical (n = 33)

P

<100

0.17, 0.11, 12

0.33, 0.19, 12

0.455

101 - 300

0.64, 0.31, 11

3.71, 1.82, 7

0.054

301 - 1000

1.36, 0.43, 11

4.0, 0.632, 6

0.003

>1000

1.25, 0.629, 4

1.75, 0.70, 8

0.659