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#1
06-10-2011
 USMLE Forums Master Steps History: 1+CK+CS+3 Posts: 1,357 Threads: 194 Thanked 3,372 Times in 906 Posts Reputation: 3382
Biostatistics #17 - RR and Attributable risk

Bladder Cancer rates in Cigarette Smokers and Nonsmokers:

Cigarette Smokers:.....48.0 Bladder cancer per 100,000 males
Nonsmokers:..............25.4 Bladder cancer per 100,000 males

1. The relative risk of developing bladder cancer for male cigarette smokers compared with male nonsmokers is
a. 48.0
b. 48.0 - 25.4 = 22.6
c. 48.0/25.4 = 1.89
d. [48.0 - 25.4]/48.0
e. cannot be computed from the data given

2. The attributable risk of bladder cancer due to cigarette smoking in male cigarette smokers is
a. 48.0/25.4 = 1.89
b. 48.0 - 25.4 = 22.6 per 100,000
c. 48.0
d. 48.0/100,000 = 0.00048
e. cannot be computed from these data

Last edited by bebix; 06-10-2011 at 06:07 AM.
 The above post was thanked by: Al-Saoudi (06-10-2011), borderline (08-28-2012), drortho (11-24-2011), gokulramani (11-19-2015)

#2
06-10-2011
 USMLE Forums Guru Steps History: 1+CK+CS Posts: 499 Threads: 85 Thanked 540 Times in 228 Posts Reputation: 550

1 - c
2 - b
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 The above post was thanked by: bebix (06-10-2011)
#3
06-10-2011
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1. C
2. B
 The above post was thanked by: bebix (06-10-2011)

#4
06-10-2011
 USMLE Forums Guru Steps History: Not yet Posts: 324 Threads: 70 Thanked 246 Times in 146 Posts Reputation: 256

Quote:
 Originally Posted by bebix Bladder Cancer rates in Cigarette Smokers and Nonsmokers: Cigarette Smokers:.....48.0 Bladder cancer per 100,000 males Nonsmokers:..............25.4 Bladder cancer per 100,000 males 1. The relative risk of developing bladder cancer for male cigarette smokers compared with male nonsmokers is a. 48.0 b. 48.0 - 25.4 = 22.6 c. 48.0/25.4 = 1.89 d. [48.0 - 25.4]/48.0 e. cannot be computed from the data given 2. The attributable risk of bladder cancer due to cigarette smoking in male cigarette smokers is a. 48.0/25.4 = 1.89 b. 48.0 - 25.4 = 22.6 per 100,000 c. 48.0 d. 48.0/100,000 = 0.00048 e. cannot be computed from these data
1.C
2.B
 The above post was thanked by: bebix (06-10-2011)
#5
06-10-2011
 USMLE Forums Veteran Steps History: 1 + CK Posts: 230 Threads: 7 Thanked 89 Times in 71 Posts Reputation: 99

1. C
2. B
 The above post was thanked by: bebix (06-10-2011)
#6
06-10-2011
 USMLE Forums Master Steps History: 1+CK+CS+3 Posts: 1,357 Threads: 194 Thanked 3,372 Times in 906 Posts Reputation: 3382

yup, c & b are the answers...
 The above post was thanked by: pass7 (06-10-2011)
#7
11-05-2015
 USMLE Forums Scout Steps History: Not yet Posts: 16 Threads: 6 Thanked 2 Times in 2 Posts Reputation: 12

Can somebody explain why those answers?

 Tags Biostatistics-Epidemiology, Step-1-Questions

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