Effect of advanced glycation end products on nocturia or sleep disorders: A longitudinal study.

OBJECTIVE

This study aimed to investigate the effect of advanced glycation end products (AGEs) on nocturia and sleep disorders in community-dwelling adults.

MATERIALS AND METHODS

This longitudinal study evaluated AGEs level, sleep disorders and nocturia frequency in 447 community-dwelling adults between May 2011 and May 2016. Sleep disorders were evaluated using the Pittsburgh Sleep Quality Index (PSQI) score. Participants were divided into two groups: AGEs-low (≤1.80) and AGEs-high (>1.80). The longitudinal nocturia and PSQI changes for 5 years between the AGEs-low and AGEs-high groups were compared. The effect of baseline oxidative stress on worsening of nocturia or PSQI score 5 years later was evaluated using multivariable logistic regression analyses.

RESULTS

There was no significant difference in PSQI score and nocturia frequency between the AGEs-low ( = 223) and AGEs-high ( = 224) groups at baseline. The PSQI score and nocturia frequency increased significantly over 5 years in both groups. However, the PSQI score increased significantly in the AGEs-high group compared with the AGEs-low group, although there was no difference in nocturia. Background-adjusted multivariable analysis showed that the AGE-high was significantly associated with PSQI score worsening, but AGE-high was not significantly associated with nocturia worsening.

CONCLUSIONS

Oxidative stress may be significantly associated with worsening sleep disorders, although oxidative stress may not significantly worsen nocturia frequency.