Table 5

Potential consequences of alternative prescriptive strategies

Strategy

Number not developing late anemia (n = 4,136)

Number developing late anemia (n = 1,034)

Predictive strength

Not treated

Treated

Not treated

Treated

Sensitivity

Specificity

PPV

NPV

Corwin^a

2,666

1,470

234

800

0.77

0.65

0.35

0.92

Broad-based^b

0

4,136

0

1,034

1.00

0

0.20

Undefined

Late anemia, reached or would have reached 7.0 g/dl at 7 days or more after admission to intensive care unit. NPV, negative predictive value; PPV, positive predictive value. ^aPatients were treated on the basis of clinical trial inclusion criteria in reference [5]. ^bStrategy in which all patients are treated.

Milbrandt et al. Critical Care 2006 10:R39   doi:10.1186/cc4847