What would be the effect on age-specific incidence rates of uterine cancer if women with hysterectomies were excluded from the denominator of incidence calculations assuming that most women who have had hysterectomies are older than 50 years of age?

1. The inhabitants of a metropolis on February 15, 2005, was 36,600. Town has a passive surveillance system that collects hospital and personal doctor reviews of influenza circumstances each month. In the course of the interval between January 1 and April 1, 2005, 2,200 new circumstances of influenza occurred within the metropolis. Of those circumstances, 775 individuals had been sick with influenza in response to surveillance reviews on April 1, 2005. The prevalence price of energetic influenza as of April 1, 2005, was:

Right reply: 20 per 1,000 inhabitants

Answer: Prevalence price = Variety of circumstances / Complete inhabitants Variety of circumstances on April 1, 2005 = 775 Complete variety of circumstances between January 1 and April 1, 2005 = 2,200 Due to this fact, variety of circumstances on January 1, 2005 = 2,200 – 775 = 1,425 Prevalence price on April 1, 2005 = (775 / 36,600) x 1,000 = 20 per 1,000 inhabitants