“slight significance”

At high DOC bioavailability, biofilm C and N increased along the TDP gradient following a quadratic regression (red curve, Figure 2a,b ), although the regression coefficients showed only slight significance for biofilm N (Table S1 ).

From the plot, the effect was mostly constant and only shows slight significance at lifetime HIV test count of 30 above, indicating that risk of unsuppressed viral load increases with a higher number of lifetime HIV tests.