Complex sentence: It is however worthwhile to note that the intention of the PEI index is not to assess democracy but rather to assess electoral integrity thus, while elections are frequently associated as the primary mechanism of democracies, they exist in democratic and non-democratic states alike.
Split into simpler sentences: It is however worthwhile to note that the intention of the PEI index is not to assess democracy but rather to assess electoral integrity. Thus while elections are frequently associated as the primary mechanism of democracies, they exist in democratic and non-democratic states alike.