Table 3.
Degree of LDH isoenzyme elevation
|
Fold above upper limit of normal
|
|||||
|---|---|---|---|---|---|
| Isoform | Known tissue sources | Mean | SEM | P vs LD1 | P vs LD2 |
| LD1 | Red cell, heart, kidney | 1.41 | 0.03 | — | — |
| LD2 | Red cell, heart, kidney | 0.97 | 0.01 | .01 | — |
| LD3 | Lymphoid, platelet | 0.46 | 0.01 | <.001 | <.001 |
| LD4 | Liver, skeletal muscle | 0.32 | 0.02 | <.001 | <.001 |
| LD5 | Liver, skeletal muscle | 0.52 | 0.03 | <.001 | <.001 |
The degree of elevation of each LDH isoenzyme fraction was calculated as the fold above normal. The mean and SEM are shown for each fraction, each representing n = 50. A2-tailed unpaired t test was performed to compare the values for LD1 fraction and LD2 fractions to the other fractions.
— indicates not applicable.