An objective correlation of specific haematological parameters with ED severity.

This study aims to investigate the role of nocturnal penile tumescence and rigidity (NPTR) and laboratory features in patients with mild, moderate and severe ED and then explored the correlation between ED severity with certain blood count parameters such as WBC and NLR. A total of 86 ED patients (age 29.8 ± 7.09 years) were enrolled. Classification of ED severity according to IIEF-5 scores was as follows: mild ED, 43.02% (37/86); moderate ED, 27.91% (24/86) and severe ED, 29.07% (25/86). Patients with moderate and severe ED had declined IIEF-5 scores and increased GAD-7 and PHQ-9 scores compared with mild ED. The mean NLR value of the mild, moderate and severe ED groups was 1.43 ± 0.39, 1.74 ± 0.45 and 2.0 ± 0.58, respectively. Stratification analysis according to NPTR results indicated that there was a significant difference in WBC and NLR between the two groups. Patients with abnormal NPTR had increased WBC and NLR levels compared with the normal groups. Multivariate logistic regression analysis suggested that severe ED (OR [95% CI]: 5.736 [1.248-26.354]), WBC (OR [95% CI]: 1.676 [1.094-2.567]) and NLR (OR [95% CI]: 5.595 [1.478-21.178]) were identified as independent risk factors for severe ED (abnormal NPTR results). In conclusion, this study indicates a significant difference in NLR, PLR, PDW, MPV and HDL between the mild, moderate and severe ED groups. The WBC and NLR are significantly increased in patients with severe ED (abnormal NPTR results) and it can be available as a quick, easy and cheap investigation compared with the RigiScan to evaluate the severity of ED with good sensitivity and specificity, which is important for the diagnosis and evaluation of ED.