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Characteristics of the study group.
| Parameter | N | Mean | Median | Minimum | Maximum | SD |
| Age | 32 | 48.19 | 48.00 | 30.00 | 71.00 | 11.02 |
| Duration of symptoms (months) | 32 | 3.36 | 4.00 | 0.60 | 6.00 | 2.26 |
| Parameter | N | Median | Lower quartile | Upper Quartile | Interquartile range | |
| Duration of symptoms (months) | 32 | 4.00 | 1.00 | 6.00 | 5.00 | |
