Skip to main content

Table 3 Variances for matched pairs comparisons.

From: Calculating unreported confidence intervals for paired data

Statistic

Variance

Estimate of variance

risk difference (general)*

risk difference (null)**

log risk ratio (general) †

log odds ratio (general) ‡

  1. *Altman et al. [11], p.52.
  2. **Fleiss, Levin and Paik [12], p.375.
  3. †Væth and Poulsen [13]
  4. ‡ Rothman and Greenland [14], p.286
Back to article page

BMC Medical Research Methodology

ISSN: 1471-2288

Contact us