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 | |||
. | . | 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.