monday, august 13, 2007nasug 2007 metaanalytic integration of diagnostic accuracy studies in stata...
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Monday, August 13, 2007 NASUG 2007
METAANALYTIC INTEGRATION OF DIAGNOSTIC ACCURACY STUDIES IN STATA
Ben A. Dwamena, MDDepartment of Radiology (Nuclear Medicine)
Monday, August 13, 2007 NASUG 2007
QUALITY ASSESSMENTmidas tp fp fn tn prodesign ssize30 fulverif testdescr refdescr subjdescr ///
report brdspect blinded, id(author) year(year) qualib
0 20 40 60 80 100percent
blinded
brdspect
fulverif
prodesign
refdescr
report
ssize30
subjdescr
testdescr
BAR GRAPH OF QUALITY ASSESSMENT
Yes No
Monday, August 13, 2007 NASUG 2007
BIVARIATE BOXPLOTmidas tp fp fn tn, id(author) year(year) ms(0.75) bivbox
Monday, August 13, 2007 NASUG 2007
SUMMARY RESULTS midas tp fp fn tn, id(author) year(year) es(x) ms(0.75) sumstats
Monday, August 13, 2007 NASUG 2007
SUMMARY RESULTS:midas tp fp fn tn, id(author) year(year) ms(0.75) es(x) sumstats
Monday, August 13, 2007 NASUG 2007
FOREST PLOTmidas tp fp fn tn, id(author) year(year) es(x) ms(0.75) ford for(dss)
DLR POSITIVE (95% CI)
27.28[9.81 - 75.84]
1.80 [0.81 - 3.99]7.56 [1.68 - 34.04]2.39 [1.03 - 5.56]7.60 [1.69 - 34.19]5.89 [2.62 - 13.23]1.91 [0.90 - 4.05]15.55 [1.04 - 232.22]83.52 [5.26 - 1000.00]26.42 [1.69 - 414.06]9.78 [2.09 - 45.72]8.33 [1.84 - 37.69]14.25 [3.72 - 54.57]5.02 [2.52 - 10.00]7.18 [2.24 - 23.03]31.57 [2.04 - 488.19]3.34 [1.64 - 6.80]3.44 [1.90 - 6.24]18.05 [6.90 - 47.22]9.35 [4.53 - 19.32]4.00 [1.48 - 10.84]4.00 [1.48 - 10.84]
STUDY(YEAR)
Q = 67.63, df = 19.00, p = 0.00I2 = 59.30 [59.30 - 84.51]
COMBINED
Tse 1992Adler1 1993
Hoh 1993Crowe 1994
Avril 1996Bassa 1996
Scheidhauer 1996Utech 1996Adler2 1997
Palmedo 1997Noh 1998
Smith 1998Rostom 1999Yutani1 1999Hubner 2000
Ohta 2000Yutani2 2000
Greco 2001Schirrmeister 2001
Yang 2001
0.8 1000.0DLR POSITIVE
Monday, August 13, 2007 NASUG 2007
FOREST PLOTmidas tp fp fn tn, id(author) year(year) es(x) ms(0.45) for(dss)
STUDY(YEAR)
Q = 40.28, df = 19.00, p = 0.00I2 = 52.84 [28.82 - 76.85]
COMBINED
Tse 1992Adler1 1993
Hoh 1993Crowe 1994
Avril 1996Bassa 1996
Scheidhauer 1996Utech 1996
Adler2 1997Palmedo 1997
Noh 1998Smith 1998
Rostom 1999Yutani1 1999Hubner 2000
Ohta 2000Yutani2 2000
Greco 2001Schirrmeister 2001
Yang 2001
0 3DLR NEGATIVE
Monday, August 13, 2007 NASUG 2007
UNCONDITIONAL PREDICTIVE VALUESmidas tp fp fn tn, ms(0.75) es(x) pddam(r)
Monday, August 13, 2007 NASUG 2007
UNIVARIABLE META-REGRESSIONmidas tp fp fn tn prodesign brdspect
blinded, covars
Monday, August 13, 2007 NASUG 2007
WORK-IN-PROGRESS
Extending bivariate model to assess: Publication bias using
association-marginal modeling Influencial Studies Heterogeneity using ICCs Nonparametric modeling of
random effects etc