The association between renal tubular damage and rapid renal deterioration in the Japanese population: The Takahata study

Kosuke Kudo, Tsuneo Konta, Yusuke Mashima, Kazunobu Ichikawa, Satoshi Takasaki, Ami Ikeda, Masato Hoshikawa, Kazuko Suzuki, Yoko Shibata, Tetsu Watanabe, Takeo Kato, Sumio Kawata, Isao Kubota

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)


Background: Injury to renal tubules plays an important role in the development of various renal diseases; however, the prevalence and significance of renal tubular damage in the general population are unclear. To clarify this point, we conducted a community-based study, using urinary β2- microglobulin as a marker of tubular damage. Methods: The subjects studied were 3,444 Japanese over the age of 40 years. The urinary β2- microglobulin-creatinine ratio (UBCR) was assessed in morning spot urine samples. Results: In this population, the distribution of the UBCR among these subjects was skewed towards higher values and a high UBCR (≥300 μg/g) was identified in 438 (12.7%) subjects. However, overlap with macroalbuminuria and renal insufficiency [estimated glomerular filtration rate (eGFR) <60 mL/min/1.73 m2] was observed in only 25 (5.7%) and 58 (13.2%) of these subjects, respectively. Multivariate analysis indicated that a high UBCR was positively associated with aging, hypertension, macroalbuminuria and increased urinary sodium excretion. A 5-year longitudinal analysis in 899 subjects indicated a greater decline in eGFR in parallel with the increase in baseline UBCR. After adjustment for possible confounders, a high UBCR was an independent risk factor for rapid decline in eGFR [<-10 mL/min/1.73 m 2; odds ratio 1.79 (95% confidence interval 1.07-2.99), P = 0.026]. Conclusion: This study showed that renal tubular damage was common and was an independent risk factor for renal deterioration in the Japanese population. More attention should be paid to occult renal tubular damage in order to prevent end-stage renal disease.

Original languageEnglish
Pages (from-to)235-241
Number of pages7
JournalClinical and experimental nephrology
Issue number2
Publication statusPublished - 2011 Apr
Externally publishedYes


  • General population
  • Renal insufficiency
  • β-microglobulin

ASJC Scopus subject areas

  • Physiology
  • Nephrology
  • Physiology (medical)


Dive into the research topics of 'The association between renal tubular damage and rapid renal deterioration in the Japanese population: The Takahata study'. Together they form a unique fingerprint.

Cite this