Ectomycorrhizal fungal (EMF) communities are highly diverse at the stand level. To begin to understand what might lead to such diversity, and to improve sampling designs, we investigated the spatial structure of these communities. We used EMF community data from a number of studies carried out in seven mature and one recently fire-initiated forest stand. We applied various measures of spatial p...

The objective of this study was to test the hypothesis that HIV interacts with human papilloma virus (HPV) to increase the odds of cervical neoplasia. The study design was a meta-analysis using data pooled from published sources. Studies published between January 1986 and March 1998 were eligible for inclusion if they included data on neoplasia (cytology-based), HIV (defined by laboratory and/o...

Reliable interpretation of landscape genetic analyses depends on statistical methods that have high power to identify the correct process driving gene flow while rejecting incorrect alternative hypotheses. Little is known about statistical power and inference in individual-based landscape genetics. Our objective was to evaluate the power of causal-modelling with partial Mantel tests in individu...

The authors develop jackknife and analytical variance estimators for the estimator of Chambers & Dunstan (1986) and Rao, Kovar & Mantel (1990) of the finite population distribution function, using complete auxiliary information. They also describe the associated model and show the design consistency of the variance estimators, whose small-sample performance is examined through a limited simulat...

Previously, Mantel, Bohidar, and Ciminera (Mantel-Haenszel analyses of litter-matched time-to-response data, with modifi cations for recovery of interlitter information. Cancer Res., 37: 3863-3868, 1977) described how the Mantel-Haenszel method could be applied to litter-matched time-to-tumor data. Each litter would be treated as a separate stratum but only for as long as there remained contras...