Worker to prove sickness' work-connection by substantial evidence

In cases filed before administrative or quasi-judicial bodies, like the ECC, a fact is deemed established if it is supported by substantial evidence or that amount of relevant evidence which a reasonable mind might accept as adequate to justify a conclusion. It was then enough if the private respondent was able to show that the nature of her work or her working conditions increased the risk of her contracting ureterolithiasis. Certainly, it was not necessary for her to breach the parameters of substantial evidence and to cross the difficult area of preponderance of evidence. This Court agrees with the Court of Appeals that the private respondent successfully discharged her burden of evidence and convincingly showed that, indeed, the nature of her work or her working conditions increased the risk of contracting ureterolithiasis. [G.R. No. 121545. November 14, 1996]