Postmortem Interval Estimation and Validation Through a Comparative Study of South American Flies Reared in the Field Versus Laboratory Conditions

Studies under constant temperatures are the most common to estimate the Postmortem Interval (PMI). It is imperative that forensic sciences have data from studies carried out in the field. Therefore, this work aims to: (1) evaluate the parameters (weight, length, development time) associated with the life cycles of Lucilia ochricornis (Wiedemann) (Diptera: Calliphoridae) and Lucilia purpurascens (Walker) under experimental conditions in the field considering fluctuating temperatures, and (2) compare these results with those known and published by the same authors for cultures realized in the laboratory under constant temperatures; which will permit us to contrast the most widely used existing methodologies for forensic application in estimating the minimum postmortem interval (PMImin). For each season of the year, cultures of both species were made in the field, collecting information on temperature, humidity, and photoperiod to perform laboratory cultures, later comparing: development time, length, weight, and Accumulated Degree-Hours (ADH) in both types of cultures. Methods for estimating the PMI were obtained and validated with the information of the cultures grown in the field. The two types of cultures showed differences between each other for both species. The forensic use methods to estimate PMI were enhanced and their precision increased when maximum larval length data were used, and it was also concluded that feeding larval stages are the most accurate to be used in making estimates because the larva is growing. The estimation of the PMI through the use of necrophagous flies development remains reliable for obtaining the PMImin.

When Shooting for the Stars Becomes Aiming for Asterisks: P-Hacking in Family Business Research

As a side-effect of increasing publication pressures, academics may be tempted to engage in p-hacking: a questionable research practice involving the iterative and incompletely-disclosed adjustment of data collection, analysis, and/or reporting, until nonsignificant results turn significant. Prior studies in entrepreneurship-related disciplines carry the implicit notion that p-hacking is predominantly an issue in top-tier journals, where incentives to do so may be highest. This study investigates p-hacking in the family business literature, a research field with roots in the broader entrepreneurship and small business literatures, and in which discourse increasingly takes place in both dedicated field journals and in the top-tier outlets in entrepreneurship and management. Analyses of p-values published in these field- and top-tier journals allow for a comparison of the prevalence and correlates of p-hacking at these different levels of prestige. The findings suggest that p-hacking is an issue of substantial—and statistically indistinguishable—magnitudes in both field- and top-tier journals. We further observe negative correlations of female authorship and employer prestige with p-hacking, where the latter is stronger in field versus top-tier journals. Implications of these findings, their limitations, and some suggestions going forward are discussed, with particular attention for the promise of preregistration and registered reports.

The Effect of Transfer on Outcomes in Burns

Patients with burn injuries are often initially transported to centers without burn capabilities, requiring subsequent transfer to a higher level of care. This study aimed to evaluate the effect of this treatment delay on outcomes. Adult burn patients meeting American Burn Association (ABA) criteria for transfer at a single burn center were retrospectively identified. A total of 122 patients were evenly divided into two cohorts – those directly admitted to a burn center from the field, versus those transferred to a burn center from an outlying facility. There was no difference between the transfer and direct admit cohorts with respect to age, percent total body surface area burned, concomitant injury, or intubation prior to admission. Transfer patients experienced a longer median time from injury to burn center admission (1 vs. 8 hours, p &lt, 0.01). Directly admitted patients were more likely to have inhalation burn (18 vs. 4, p &lt, 0.01), require intubation after admission (10 vs. 2, p = 0.03), require an emergent procedure (18 vs. 5, p &lt, 0.01), and develop infectious complications (14 vs. 5, p = 0.04). There was no difference in ventilator days, number of operations, length of stay, or mortality. The results suggest that significantly injured, high acuity burn patients were more likely to be immediately identified and taken directly to a burn center. Patients who otherwise met ABA criteria for transfer were not affected by short delays in transfer to definitive burn care.