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Fig. 4 | Basic and Clinical Andrology

Fig. 4

From: Association between sleep quality and nocturnal erection monitor by RigiScan in erectile dysfunction patients: a prospective study using fitbit charge 2

Fig. 4

Correlations between changes of sleep parameters and changes of NPTR parameters in Group A. A Correlation between changes of WASO and changes of Tip D60% in Group A for two nights; B Correlation between changes of REM and changes of Tip D60% in Group A for two nights; C Correlation between changes of WASO and changes of TET in Group A for two nights; D Correlation between changes of REM and changes of TET in Group A for two nights. NPTR: nocturnal penile tumescence and rigidity; TET: total erection time; D60%: duration of erectile episodes with rigidity ≥ 60%; WASO: wake after sleep onset; REM: rapid eye movement; Group A was the group included participants presenting effective erectile events only on the second night; Correlation analyses were evaluated by Spearman’s and Pearson’s method as appropriate; *: P < 0.05 for the correlation analysis; ns: P > 0.05 for the correlation analysis

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