Question 18N.2.SL.TZ0.1d
| Date | November 2018 | Marks available | [Maximum mark: 2] | Reference code | 18N.2.SL.TZ0.1d |
| Level | SL | Paper | 2 | Time zone | TZ0 |
| Command term | Describe | Question number | d | Adapted from | N/A |
Trends in tobacco smoking and mortality due to lung cancer were measured in male and female smokers aged 35 to 59 living in the United Kingdom from 1950 to 2000. The first graph represents the proportion of smokers in the population. The second graph represents the mortality rate (deaths per year per 100 000 people) from lung cancer.
The incidence of lung cancer in 75-year-old males was studied comparing current smokers, former smokers and non-smokers.
Describe the relationship between the incidence of lung cancer and stopping smoking.
[2]
a. highest incidence with continual smoking ✔
b. negative correlation/incidence decreases with length of time not smoking ✔
c. decrease «in incidence» occurs at less than 10 years since stopping smoking ✔
d. after 30 years incidence is not much more than non-smokers ✔
