i have run a regression analysis. In which ROA (return on assets) , ROE(return on equity) and NIM (net interest margin) are my dependent variables for profitability and capital ratio (EBIT/Total asset) and Deposit ratio (Total deposits/Total assets) are my independent variables.

according to my results capital ratio and deposit ratio both have positive significant effect on ROE ratio and NIM

but my results for capital ratio and deposit ratio have insignificant effect on ROA

how can in interpret this. according to research deposit ratio should have a positive effect on ROA if it has significant effect on ROE and NIM

how can i explain this result