Goodman and Kruskal's gamma tests were first used to investigate an association between higher categories of exposure and higher numbers of the emergence of resistance.
Taking into account this new framework, the Directive covers all exposure situations and all categories of exposure, namely occupational, public and medical.
For exposures that can vary in amount or level, did the study examine different levels of the exposure as related to the outcome (e.g., categories of exposure, or exposure measured as continuous variable)?
Zones were designed by statistically classifying smallest census areas (disseminations areas) into seven categories of exposure similar along three indicators of ALP: population density, land use mix, and geographic accessibility to services.
RRs were estimated for the following categories of exposure: Hexavalent products (Hexavac; Infanrix hexa); Other concomitant administration of six antigens (e.g., pentavalent + monovalent vaccines); Other vaccine administration (any other administration of antigens: e.g., pentavalent vaccines; tetravalent + monovalent vaccines; tetravalent vaccines; MMR).
No significant trend across categories of exposure was noted.
The researcher only assessed risk in the highest compared with the lowest categories of exposure.
Data regarding broad categories of exposure (e.g., dusts, pesticides, liquids, etc).
This association is statistically significant only at higher categories of exposure.
However, there was no monotonic trend for the association across increasing categories of exposure.
Risk ratios across all categories of exposure likelihood indicate a dose-response pattern.
