11. Prospective studies have many benefits over case control studies.12. Temporality can be established in a prospective study , and confounders are more easily controlled for. 13. According to Perera, the method most likely to yield a useful payoff is the prospective study . 14. Prospective study of swimmer's itch incidence and severity.15. A prospective study demonstrated a reduction in the incidence and progression of Alzheimer's disease and dementia. 16. There are no prospective studies in arterial disease. 17. Only prospective studies constitute conclusive proof of the suitability of a technique for a particular target. 18. prospective studies shows the risk of Parkinson s disease in humans is reduced significantly by midlife exercise.19. Definitive, prospective studies that can overcome the limitations of previous investigations are now a matter of urgency. 20. In a prospective study of Swedish recruits who trained in the coastal areas, 8.9 % showed seroconversion
