Question

Part 3: Read each of the following studies, construct the appropriate 202 table, calculate the measure of association, state the study design, and state the interpretation of the results. 1. An investigator wanted to determine whether playing video games constantly (chronic videogamer, CVG) was associated with carpal tunnel syndrome (CTS). By interviewing males ages 15-30 in a Midwestern city, the researchers located 800 males with CTS. A total of 1600 additional males without CTS were selected at random and interviewed. Of those with CTS, 117 reported not being a CVG. 924 control males reported being a CVG. Construct the appropriate 2x2 table and calculate the odds ratio between chronic videogaming and carpal tunnel syndrome.1 2x2 table Odds Ratio Interpretation Type of study design

Answer 1

	CARPAL TUNNEL SYNDROME ( POSITIVE)	CARPAL TUNNEL SYNDROME(NEGATIVE)
CHRONIC VIDEO GAMING ( POSITIVE)	683 (a)	924(b)
CHRONIC VIDEO GAMING (NEGATIVE)	117 (c)	676 (d)

800 1600

odds ratio (cross ratio) = (a)*(d) = ad/bc = (683*676)/(924*117)= 4.27=4(approx)

(b)*(c)

INTERPRETATION'

the chance of carpel tunnel disease to occur in chronic video gamer is 4 times more than that of the non chronic video gamer.

TYPE OF STUDY

CASE CONTROL STUDY.

because both the case and control are taken prior to the study, study is in retrospective manner.