Objective We examined whether home blood pressure (BP)-based behavioural guidance had an additional anti-albuminuric effect on school workers with the simple diagnostic provision of microalbuminuria.Methods Of 169 school staff diagnosed with microalbuminuria (30-299.9 mg/gCr) in the annual 2019 health check-up, 91 agreed to receive home-BP-based guidance. Guidance comprised, for subjects with >= 135/85 mmHg, 5 days mean of home BP measurements, or encouraging medical consultation and lifestyle guidance; lifestyle guidance for subjects with BP 125-134/80-84 mmHg; and adequate lifestyle guidance for subjects BP <125/80 mmHg, if necessary. The main outcome was a change in the frequency of microalbu-minuria the following year. Subjects with menstruation were excluded from analysis. Finally, there were 48 and 43 participants in guided and the non-guided groups, respectively.Results The guided and non-guided groups demonstrated similar baseline clinical data. Their prescription rates for hypertension (39.6 vs. 41.9 %) and diabetes (18.8 vs. 30.2 %) were similar. One year later, microal-buminuria was present in 31.2% and 30.2% of the guided and non-guided groups (n.s.), respectively, suggest -ing a similar to 70% risk reduction of microalbuminuria in both groups. Sensitivity analysis, excluding patients treated for hypertension or diabetes at baseline, demonstrated essentially similar results. In conclusion, the risk re-duction of microalbuminuria was nearly 70% for both the home-BP-based guidance and non-guidance groups.Conclusion These data suggest that home BP-based guidance did not increase anti-albuminuric effects on simple diagnostic provision of microalbuminuria in school workers.