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Types of stent related urinary symptoms over time (Data presented as median score)
P-valuea: Friedman test (only showed whether there was significant change between pre-stenting and 12 months)
Pb: p-value = Bonferroni correction (multiple comparison test, showed whether there was significant difference between each 3 months from pre-stenting to 12 months)
Pre: pre-stenting, IPSS: International Prostate Symptom Score, QoL: Quality of Life, M: months
