Table 3: The correlation of pre DTT treatment and post DTT treatment results obtained by CTT (1+) and CAT (1+,2+,3+) measuring IgG and IgM antibodies for anti-A and anti-B.
Antibody |
Comparing methods |
Spearman’s rho |
p-value |
Strength of correlation |
Association |
Direction of correlation |
IgM |
||||||
Anti-A |
CTT(1+) - pCAT(1+) |
0.58 |
< 0.05 |
Moderate |
Significant |
Positive |
Anti-B |
CTT(1+) - pCAT(1+) |
0.60 |
< 0.05 |
Strong |
Significant |
Positive |
IgG |
||||||
Anti-A |
CTT(1+) - pCAT(1+) |
0.48 |
< 0.05 |
Moderate |
Significant |
Positive |
Anti-B |
CTT(1+) - pCAT(1+) |
0.61 |
< 0.05 |
Strong |
Significant |
Positive |
IgM |
||||||
Anti-A |
CTT(1+) - pCAT(2+) |
0.62 |
< 0.05 |
Strong |
Significant |
Positive |
Anti-B |
CTT(1+) - pCAT(2+) |
0.65 |
< 0.05 |
Strong |
Significant |
Positive |
IgG |
||||||
Anti-A |
CTT(1+) - pCAT(2+) |
0.63 |
< 0.05 |
Strong |
Significant |
Positive |
Anti-B |
CTT(1+) - pCAT(2+) |
0.71 |
< 0.05 |
Strong |
Significant |
Positive |
IgM |
||||||
Anti-A |
CTT(1+) - pCAT(3+) |
0.56 |
< 0.05 |
Moderate |
Significant |
Positive |
Anti-B |
CTT(1+) - pCAT(3+) |
0.61 |
< 0.05 |
Strong |
Significant |
Positive |
IgG |
||||||
Anti-A |
CTT(1+) - pCAT(3+) |
0.48 |
< 0.05 |
Moderate |
Significant |
Positive |
Anti-B |
CTT(1+) - pCAT(3+) |
0.72 |
< 0.05 |
Strong |
Significant |
Positive |
IgM |
||||||
Anti-A |
CTT(1+) - CAT(1+) |
0.78 |
< 0.05 |
Strong |
Significant |
Positive |
Anti-B |
CTT(1+) - CAT(1+) |
0.75 |
< 0.05 |
Strong |
Significant |
Positive |
IgG |
||||||
Anti-A |
CTT(1+) - CAT(1+) |
0.78 |
< 0.05 |
Strong |
Significant |
Positive |
Anti-B |
CTT(1+) - CAT(1+) |
0.75 |
< 0.05 |
Strong |
Significant |
Positive |
IgM |
||||||
Anti-A |
CTT(1+) - CAT(2+) |
0.74 |
< 0.05 |
Strong |
Significant |
Positive |
Anti-B |
CTT(1+) - CAT(2+) |
0.73 |
< 0.05 |
Strong |
Significant |
Positive |
IgG |
||||||
Anti-A |
CTT(1+) - CAT(2+) |
0.78 |
< 0.05 |
Strong |
Significant |
Positive |
Anti-B |
CTT(1+) - CAT(2+) |
0.87 |
< 0.05 |
Very Strong |
Significant |
Positive |
IgM |
||||||
Anti-A |
CTT(1+) - CAT(3+) |
0.35 |
< 0.05 |
Weak |
Significant |
Positive |
Anti-B |
CTT(1+) - CAT(3+) |
0.09 |
0.21 |
Very weak |
Not significant |
Positive |
IgG |
||||||
Anti-A |
CTT(1+) - CAT(3+) |
0.18 |
0.007 |
Very weak |
Significant |
Positive |
Anti-B |
CTT(1+) - CAT(3+) |
0.01 |
0.87 |
Very weak |
Not significant |
Positive |
CAT: Pre DTT treatment; pCAT: Post DTT treatment