Prior research has shown the independent effects of average product ratings and number of reviews for online purchases, but the relative influence of these aggregate review attributes is still debated in the literature. In this research, the authors demonstrate the conditional influences of these two attributes as a function of the valence of average product ratings and the level of review numbers in a choice set. Specifically, they argue that the diagnosticity of the number of reviews, relative to average product ratings, increases when average product ratings are negative or neutral (vs. positive) and when the level of review numbers in a choice set is low (vs. high). As a result, when consumers choose among the best options on one of the review attributes (average product ratings or the number of reviews), their preference shifts from the higher-rated option with fewer reviews toward the lower-rated option with more reviews. The authors demonstrate this preference shift in seven studies, elucidate the underlying process by which this occurs, and conclude with a discussion of the implications for retailers and brands.

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OBJECTIVES/GOALS: Degenerative cervical myelopathy (DCM) can lead to pain, disability, and permanent spinal cord impairment. Timely diagnosis and surgical intervention is essential to optimize functional outcomes for patients with CSM. Here, we compared patients who were admitted through clinic versus the emergency department (ED) for surgical management of DCM. METHODS/STUDY POPULATION: Patients aged ≥18 years admitted for surgery for DCM through clinic (elective cohort) were compared to a surgical cohort who were evaluated through the ED (call cohort). Basic demographics included age, gender, race, ethnicity, and insurance payor. Sociodemographic characteristics were estimated using the Social Deprivation Index (SDI) and the Area Deprivation Index (ADI) for the state of California, which were obtained through aggregated Zip Code Tabulation Area (ZCTA). Cervical MRI was reviewed to assess severity of spinal cord compression. Other outcomes included number of motion segments operated on, functional outcome using the Nurick classification, length of stay (LOS), disposition, and 30-day reoperation and readmission rates. RESULTS/ANTICIPATED RESULTS: From 2015 to 2021, 327 DCM patients received surgery (227 Elective Cohort, 100 Call Cohort). Elective cohort was mainly female (48.0 vs 30.0%, p=0.002) and white (72.7 vs 51.0%, p=0.0001). Call cohort was mainly uninsured/covered by Medicare/Medicaid (78.0 vs 67.0%, p=0.04), had higher SDI (68.0 vs 56.2, p=0.0003), ADI (7.9 vs 7.2, p=0.009), and cervical cord compression on MRI (78.0 vs 42.3% Grade III, p DISCUSSION/SIGNIFICANCE: Compared to DCM patients undergoing elective surgery, those admitted through the ED were more likely to be male, non-White, and socioeconomically disadvantaged, as measured by SDI and ADI. Postoperative outcomes were less favorable for these patients, including longer hospital stay, discharge disposition, and less Nurick grading improvement.

The chief goal of the present study was to elucidate whether the short-term temporal relationships between depressive and anxious symptoms vary by sex. Three hundred and fifty-seven undergraduate students self-reported depressive and anxious symptomatology with the Beck Depression Inventory (BDI-II) and the Beck Anxiety Index (BAI) two times 11 weeks apart. A latent variable path model analysis found support for a bi-directional relationship between depressive symptoms and anxious symptoms for the overall sample. An equality constraint analysis revealed that depressive symptoms predicted anxious symptoms over time to a similar extent as anxious symptoms predicted depressive symptoms over time. However, several temporal relationships significantly varied by sex, namely, females demonstrated greater stability of depressive symptoms over time, and evidenced a stronger cross-lag relationship from depressive symptoms at Time 1 to anxious symptoms at Time 2, and males, on the other hand, exhibited a marginally more stable anxious symptoms test-retest relationship over time. The results supported the existence of a bi-directional relationship between depressive and anxious symptoms over a short-term period of time for emerging adults. We conclude that current states of depressive symptoms may be more influential for females' subsequent negative affective states, whereas anxious symptoms may be more important for males' subsequent negative affective states.