Complex sentence: The third party studies have all been performed using Christian prayers, and reported either null results, correlated results, or contradictory results in which beneficiaries of prayer had worsened health outcomes.
Split into simpler sentences: The third party studies discussed here have all been performed using Christian prayers. Some have reported null results, some have reported correlations between prayer and health, and some have reported contradictory results in which beneficiaries of prayer had worsened health outcomes.