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Comparison of correlations between selected parameters
| Correlation analysis | Correlation coefficient r | Correlation direction and level |
|---|---|---|
| Length of illness – IL-2 sR before ozonotherapy | –0.12 | Negative, weak |
| Length of illness – IL-2 sR after ozonotherapy | –0.05 | Negative, faint |
| The length of illness – neopterin before ozonotherapy | +0.24 | Positive, weak |
| The length of illness – neopterin before ozonotherapy | +0.26 | Positive, weak |
| IL-2 sR – neopterin | +0.16 | Positive, weak |
