to determine the SLU that resulted from the relevant work-related injury as opposed to other causes. To obtain an increase over the SLU previously awarded and based on the earlier guidelines there must be objective medical evidence that the claimant’s anatomical or functional loss (e.g. ROM) has increased since the prior SLU and the evaluation under the 2018 Guidelines results in a higher SLU than the one previously awarded. No increased SLU should be awarded if claimant’s anatomical or functional loss is substantially the same as it was at the time of the prior SLU, even if an assessment pursuant to the 2018 guidelines would result in a higher SLU percentag