Cross-sectional study limitations
Research gap analysis derived from 3 medicine papers in our local library.
The gap
Most studies rely on cross-sectional designs, which cannot establish causality; future research should include longitudinal or experimental designs to address this limitation.
Consensus across the literature
The papers collectively leave open the establishment of causal relationships due to their reliance on cross-sectional methods.
Research trend
Emerging — attention growing, methods still coalescing.
Supporting evidence — 3 representative gaps
- The ventral hippocampus to paraventricular thalamus circuit regulates context-dependent hyperlocomotion through PAC1 receptor signaling in the chronic stress-induced PTSD mouse model (2026) · doi
The study used only male mice to control for confounding effects of the estrous cycle; findings cannot be directly extrapolated to females given established sexual dimorphism in the PACAP/PAC1 system and estrogen-dependent modulation.
Keywords: used male mice control confounding effects estrous cycle cannot directly extrapolated females given established sexual - Case Report: Hypereosinophilic syndrome misdiagnosed as atopic dermatitis due to refractory pruritic rash masking peripheral neuropathy (2026) · doi
Causality cannot be definitively established in this single case regarding the proposed sensory masking hypothesis, as the temporal association only supports a biologically plausible mechanism rather than proven causation.
Keywords: causality cannot definitively established single case regarding proposed sensory masking hypothesis temporal association supports biologically - A lower LDL-c/ApoB ratio is associated with an increased prevalence of gallstones in the regional Chinese adult population, according to a retrospective, propensity-matched analysis (2026) · doi
Due to the cross-sectional nature of the study, causality cannot be established.
Keywords: cross sectional nature causality cannot established
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