toenail


The data frame consists of 250 patients from a multicenter study comparing to treatments for toenail infection.


Generalized estimating equations with the original sandwich variance estimator proposed by Liang and Zeger (1986), and eight types of more recent modified variance estimators for improving the finite small-sample performance.

Zheng Li

geesmv

Modified Variance Estimators for Generalized Estimating
Equations

toenail function

<ul>
<li> ID: patient id. The variable for cluster id
  </li>
<li> Response: toenail infection status: 0=none or mild; 1=moderate or severe
  </li>
<li> Treatment: 1=oral treatment A; 0=oral treatment B
  </li>
<li> Month: the exact time point of measurement in month
  </li>
<li> Visit: the visit index
 </li>
</ul> 

Format

De Backer M, De Vroey C, Lesaffre E, Scheys I, De Keyser P. Twelve weeks of continuous oral therapy for toenail onychomycosis caused by dermatophytes: a double-blind comparative trial of terbinafine 250 mg/day versus itraconazole 200 mg/day. Journal of the American Academy of Dermatology 1998; 38: 57-63.

toenail: Toenail infection data from a multicenter study

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