QuestionSBA
QuestionChoice
This is incorrect.
10003417
b
0.8
QuestionChoice
Relative risk is calculated by dividing the risk of an adverse event in the exposed group by the risk in the non-exposed group. In this case, the calculation would be [(45/119)]/[(67/123)], which equals 0.69.
10003416
a
0.69
QuestionChoice
This is incorrect.
10003419
d
1.3
QuestionChoice
This is incorrect.
10003418
c
1
QuestionChoice
This is incorrect.
10003420
e
1.5
Concept
Chapter
2693
4159
Relative risk
Topic
207
Research methods
13230
A study was conducted to compare the effects of cognitive behavioural therapy versus a control therapy on the treatment of schizophrenia.

The effectiveness was assessed by measuring the incidence of psychotic episodes over 2 years (24 months).

The findings are shown below:

|  | Exposed group | Non-exposed group |
| --- | --- | --- |
| Psychotic episodes | 45 | 67 |
| No psychotic episodes	 | 74 | 56 |

Calculate the relative risk of a psychotic episode.
a