Table 4

Accuracy of final DGGE model* in predicting API status at age 3 years

API index

N

Pos

Neg


DGGE model Pos.

13

19

32

PPV = 41%

DGGE model Neg.

11

67

78

NPV = 86%

Total

24

86

110


54% S

78% Sp

X2, p = 0.002


Overall correct classification: 80/110 = 73%

API prevalence: 24/110 = 22%

Final DGGE model:

Positive: presence of band 60.1 (Clostridium coccoides subcluster XIVa) or band 45.9 (Bacteroides fragilis subgroup)

Negative: absence of band 60.1 (Clostridium coccoides subcluster XIVa) and band 45.9 (Bacteroides fragilis subgroup)

N: number of cases

PPV: positive predictive value

NPV: negative predictive value

S: sensitivity

Sp: specificity

Vael et al. BMC Microbiology 2011 11:68   doi:10.1186/1471-2180-11-68

Open Data