Text: He suggested that the technical aspects of screening were not as fruitful topics for research as how to screen the greatest number of patients at the lowest cost.
Entailment: Screening the greatest number of patients at the lowest cost, is a more fruitful topic for research, than the techncial aspects of screening, as he suggested.
Contradiction: He suggested, that the technical aspects of screening, were a more fruitful topic, than how to screen the greatest number of patients, at the lowest cost.