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As the population gets older, coupled with increased awareness of good health practices and the recognition that fitness contributes to participation in activities generally appropriate for younger individuals, decisions need to be made about what are appropriate activities for the older-aged scuba (self-contained underwater breathing apparatus) diver. It is essential to appreciate the distinction between chronological and physiological age. Th ree factors, namely fitness, comorbidities, and mobility and strength are fundamental when making decisions about participation in activities in general as well as in scuba diving for older adults. Th ere is almost always a time to "call it quits" for everything. [ABSTRACT FROM AUTHOR]

Pre-dive checklists can prevent mishaps, injuries, and deaths in recreational scuba diving. However, the prevalence of checklist use remains low. Understanding the environmental and individual factors influencing a diver's checklist use may help in promoting checklists. In the summer of 2012, 617 divers were enrolled in the intervention group of a cluster randomized trial. The divers received an intervention pre-dive checklist to use before they made dives. Logistic regression analyses were used to model adherence to pre-dive checklist with generalized estimating equations. About 70% divers (n=430) adhered to the intervention pre-dive checklist. Factors associated with greater adherence were the use of a diver's own written self-checklist - odds ratio (OR) = 2.48 (95% confidence intervaI: 0.95, 6.44), older age (> 35 years) - OR = 1.67 (1.15, 2.42), and higher average annual dives (6-10 dives vs. 0-5 dives) - OR = 1.87 (1.09, 3.21). Factors associated with lower adherence were diving in North Carolina as compared to the Caribbean - OR = 0.42 (0.20, 0.85), non-white race - OR = 0.54 (0.27, 1.09), and female gender - OR = 0.77 (0.54, 1.12). Checklist adherence is also a function of risk perception, facilitators, and barriers. Future studies should try to understand diver risk perceptions, promote facilitators, and reduce barriers to foster the use of pre-dive checklists. [ABSTRACT FROM AUTHOR]