Complex sentence: These effects of beta-blockers are inferior to those of other antihypertensive drugs, but the quality of this evidence is low, implying that the true effect of beta-blockers may be substantially different from this estimate.
Split into simpler sentences: These effects of beta-blockers are inferior to those of other anti hypertensive drugs. But the quality of this evidence is low, implying that the true effect of beta-blockers may be substantially different from this estimate.