Slide 22
Slide 22 text
A single two-way table [3/5] (p. 334)
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DAVID A. SAVITZ, HOWARD WACHTEL, FRANK A. BARNES, ESTHER M. JOHN, JIRI G. TVRDIK, CASE-CONTROL STUDY OF CHILDHOOD CANCER AND EXPOSURE TO 60-HZ
MAGNETIC FIELDS, American Journal of Epidemiology, Volume 128, Issue 1, July 1988, Pages 21–38, https://doi.org/10.1093/oxfordjournals.aje.a114943
X = 1
(>= 3 mG)
X = 0
(< 3 mG)
Case 3 33
Table odds ratio = RR
estimate = 3.51
Controls 5 193 95% CI = 0.80, 15.4
Estimated RR = sample OR = (3 ⋅ 193)/(5 ⋅ 33) = 3.51
؍σʔλͰͷܭࢉ
Estimated variance ln(OR) = 1/3 + 1/33 + 1/5 + 1/193 = 0.569
95 % CI of OR = exp[ln(3.51) ± 1.96 ⋅ 0.5691/2] = 0.80, 15.4