Meanings of nonequivalent in English

The research design was a nonequivalent group comparison with pretest and post-test.

Study design: We conducted a retrospective cohort study with a nonequivalent control group.

Design and methods: The research design was a nonequivalent group comparison (n = 163) with pretest and post-test.

The transfer of equivalent titers of vaccine-elicited NAb into AG129 mice also revealed nonequivalent protection, indicating qualitative differences among antibodies (Abs) elicited by these vaccines.