179 / 471
Table 2014.07B. POD summary of deli turkey results for the 3M MDA
Listeria monocytogenes
Method
a
3M
™
MDA
™
Listeria monocytogenes
Inoculation level
Uninoculated
Low
High
Candidate presumptive positive/total
No. of samples analyzed
2/132
66/132
132/132
Candidate presumptive POD (CP)
0.02 (0.01, 0.05)
0.50 (0.41, 0.59)
1.00 (0.97, 1.00)
s
r
b
0.12 (0.11, 0.16)
0.51 (0.45, 0.52)
0.00 (0.00, 0.16)
s
L
c
0.00 (0.00, 0.05)
0.00 (0.00, 0.17)
0.00 (0.00, 0.16)
s
R
d
0.12 (0.11, 0.14)
0.51 (0.46, 0.52)
0.00 (0.00, 0.23)
P
-value
e
0.5190
0.7565
1.000
Candidate confirmed positive/total No.
of samples analyzed
1/132
67/132
132/132
Candidate confirmed POD (CC)
0.01 (0.00, 0.04)
0.51 (0.42, 0.60)
1.00 (0.97, 1.00)
s
r
0.09 (0.08, 0.16)
0.51 (0.45, 0.52)
0.00 (0.00, 0.16)
s
L
0.00 (0.00, 0.04)
0.00 (0.00, 0.17)
0.00 (0.00, 0.16)
s
R
0.09 (0.08, 0.10)
0.51 (0.46, 0.52)
0.00 (0.00, 0.23)
P
-value
0.4338
0.7891
1.0000
Candidate confirmed positive/total No.
of samples analyzed
0/132
64/132
132/132
Candidate confirmed POD (C)
0.00 (0.00, 0.03)
0.48 (0.40, 0.57)
1.00 (0.97, 1.00)
s
r
0.00 (0.00, 0.16)
0.51 (0.45, 0.52)
0.00 (0.00, 0.16)
s
L
0.00 (0.00, 0.16)
0.00 (0.00, 0.16)
0.00 (0.00, 0.16)
s
R
0.00 (0.00, 0.23)
0.51 (0.46, 0.52)
0.00 (0.00, 0.23)
P
-value
1.0000
0.8249
1.000
Positive reference samples/total No. of
samples analyzed
0/132
66/132
132/132
Reference POD
0.00 (0.00, 0.03)
0.50 (0.41, 0.59)
1.00 (0.97, 1.00)
s
r
0.00 (0.00, 0.16)
0.51 (0.45, 0.52)
0.00 (0.00, 0.16)
s
L
0.00 (0.00, 0.16)
0.00 (0.00, 0.17)
0.00 (0.00, 0.16)
s
R
0.00 (0.00, 0.23)
0.51 (0.46, 0.52)
0.00 (0.00, 0.23)
P
-value
1.0000
0.7565
1.0000
dLPOD (candidate vs reference)
f
0.00 (-0.03, 0.03)
-0.02 (-0.14, 0.11)
0.00 (-0.03, 0.03)
dLPOD (candidate presumptive vs
candidate confirmed)
f
0.01 (-0.03, 0.05)
-0.01 (-0.13, 0.12)
0.00 (-0.03, 0.03)
a
Results include 95% confidence intervals.
b
s
r
= Repeatability standard deviation.
c
s
L
= Among-laboratory standard deviation.
d
s
R
= Reproducibility standard deviation.
e
P
-value = Homogeneity test of laboratory PODs.
f
A confidence interval for dLPOD that does not contain the value 0 indicates a statistical significant difference between the two methods.
Candidates for 2016 Method of the Year
144