help for bsens

Help for bsens - Sensitivity metric using McNemar's test

bsens cntdiscordant1 cntdiscordant2 gamma_min gamma_increment gamma_max

Description

bsens is used for calculating the Rosenbaum sensitivity metric (gamma) using McNemar's statistic for analyses which have binary outcomes. (Ref: Rosenbaum, Paul R(2002) Observational studies. Springer-Verlag). There are 5 input parameters for this command: cntdiscordant1, cntdiscordant2, gamma_min , gamma_increment and gamma_max.

cntdiscordant1 is the number of discordant pairs of control and treated with outcome variable 1 in the control group.
cntdiscordant2 is the number of discordant pairs of control and treated values with outcome variable 1 in the treated group.
gamma_minis the initial value of gamma.
gamma_increment is the increments in which gamma would change.
gamma_max is the maximum value of gamma.

Acknowledgements

The program is named binary sensitivity and is written by Hemang C Subramanian and Eric Overby at the Georgia Institute of Technology.

Limitations

The counts are used for k2k matches only, meaning strata which have 1 treated and 1 control observation. but may fail to report accurately if discordant_count1 is greater than discordant_count2.

Examples

bsens 100 146 1 0.5 2

Author

Hemang C Subramanian
hemang.subramanian@scheller.gatech.edu
Eric Overby
eric.overby@scheller.gatech.edu