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The current nocturnal penile tumescence ( NPT) measurement is based on standard cut-off levels defined regardless of age. This study was conducted to provide age-stratified cut-off points for NPT measurement. Forty sexually active healthy men between 20 and 60 years old were enrolled and divided equally into four groups defined by age (20-29, 30-39, 40-49 and 50-60 years.). None of the candidates had sexual dysfunction or sleep disturbance or used supportive medication to enhance sexual function. Erectile function was evaluated by using the 5-item version of the international index of erectile function ( IIEF-5). NPT was observed using the nocturnal electrobioimpedance volumetric assessment ( NEVA®). The NPT values of healthy men aged 20-60 years varied from 268.7% to 202.3%. The NPT differed significantly between age groups ( P < 0.0009); however, no significant differences between men aged 30-39 and 40-49 ( P = 0.593) were observed. Age was weakly associated with IIEF-5 scores ( P = 0.004), whereas a strong and negative correlation between age and NPT ( P < 0.0001) was found. IEF-5 scores were not significantly associated with NPT ( P = 0.95). Therefore, the standard values for NPT testing should be considered in the evaluation of the nocturnal penile activity of men of all ages. [ABSTRACT FROM AUTHOR]

Background: The integrity of collection protocols in biobanking is essential for a high-quality sample preparation process. However, there is not currently a well-defined universal method for integrating collection protocols in the biobanking information system (BIMS). Therefore, an electronic schema of the collection protocol that is based on Extensible Markup Language (XML) is required to maintain the integrity and enable the exchange of collection protocols. Materials and Methods: The development and implementation of an electronic specimen collection protocol schema (eSCPS) was performed at two institutions (Muenster and Cologne) in three stages. First, we analyzed the infrastructure that was already established at both the biorepository and the hospital information systems of these institutions and determined the requirements for the sufficient preparation of specimens and documentation. Second, we designed an eSCPS according to these requirements. Fi - nally, a prospective study was conducted to implement and evaluate the novel schema in the current BIMS. Results: We designed an eSCPS that provides all of the relevant information about collection protocols. Ten electronic collection protocols were generated using the supplementary Protocol Editor tool, and these protocols were successfully implemented in the existing BIMS. Moreover, an electronic list of collection protocols for the current studies being performed at each institution was included, new collection protocols were added, and the existing protocols were redesigned to be modifiable. The documentation time was significantly reduced after implementing the eSCPS (5 ± 2 min vs. 7 ± 3 min; p = 0.0002). Conclusion: The eSCPS improves the integrity and facilitates the exchange of specimen collection protocols in the existing opensource BIMS. [ABSTRACT FROM AUTHOR]