Needs affordance as a key factor in likelihood of problematic social media use: Validation, latent Profile analysis and comparison of TikTok and Facebook problematic use measures.

Despite increasing concerns of maladaptive cognitive responses associated with social media, estimates of its prevalence are lacking in the literature. Further, existing studies have disproportionately focused on Facebook, while ignoring the penetration of TikTok and concerns of associated maladaptive behaviors. This study aims to 1) validate scale measures for problematic Facebook and TikTok use (PFU and PTTU) 2) comparatively assess the underlying cognitive pathways of the PFU and PTTU among a sample of university students, 3) determine the cut-off score of the PTTU assessment scale using Latent Profile Analysis (LPA) and 4) evaluate the contribution of specific criteria in the diagnosis of PTTU. The scales used to assess PFU and PTTU were found to have appropriate psychometric properties. The scores between the PFU and PTTU scales were found to be strongly associated, however, the relationship was stronger in the group of Facebook users than in the group of TikTok users. Further, the manifestation of problematic use was not consistent between TikTok and Facebook. Loneliness was positively associated with both PFU and PTTU, while self-esteem was negatively associated with PFU only. The optimal cut-off score of the PTTU scale was determined to be 21, giving 8.7% as the estimated prevalence of PTTU. The criteria with the highest predictive power in the diagnosis of addiction among university students were "withdrawal" and "relapse". The study concludes that while the underlying addiction pathways are similar between platforms the manifestation of maladaptive behavior and the drivers for usage intensity and problematic use are unique.

Major Lower Limb Amputations: Recognizing Pitfalls.

Major lower extremity amputations have been an area of much concern in the Caribbean population. Hence, the purpose of this research was to investigate the current trends in major lower-extremity amputations. Data regarding all major lower-extremity amputations performed at a tertiary care institution in Trinidad and Tobago, from January 2010 to December 2016 were reviewed. The variation of yearly trends, gender, type of amputation and reason for amputation were analysed. The yearly amputation rate demonstrated a progressive increase from 2010 to 2016, the average for the seven years was 28 per 105/year. Males accounted for 59% of cases, and 60% of amputations were done above the level of the knee joint. The most common reason for amputation was control of sepsis in 71.5% of cases. A strong association between major amputations and prior intervention for a foot-related problem was observed, as 52% of the sample had a pre-existing wound or a prior minor amputation (32%). Overall, 14.5% of all amputees were able to acquire a prosthesis. Diabetes mellitus was the most consistently associated co-morbidity occurring in 91% of the study population. Major limb amputations continue to affect our population significantly, with a rise in the amputation rate despite the introduction of a Vascular Surgical Unit. Diabetes and its foot-related complications are one of the leading causes of major lower extremity amputations. Prosthetic limb acquisition for our amputee population continues to be lacking, reflected by the low prosthetic acquisition rate observed.