feld1: Cat Allergen Concentrations

In tlm: Effects under Linear, Logistic and Poisson Regression Models with Transformed Variables

Description

Simulated data for cat allergen concentrations (Fel d 1) in 471 homes, measured in both the living room and the bed mattress.

Usage

data(feld1)

Format

A data frame with 471 observations on the following 5 variables.

mattress

numeric Feld d 1 concentration in the bed mattress (microg/g).

room

numeric Feld d 1 concentration in the living room (microg/g).

logmattress

logarithm of mattress.

logroom

logarithm of room.

cat

a factor with levels no and yes, indicating cat ownership.

Details

Data were simulated to emulate true data pattern observed in a real study (see ‘References’).

Source

See ‘References’.

References

Basagana X et al. Domestic aeroallergen levels in Barcelona and Menorca (Spain). Pediatric Allergy and Immunology. 2002;13(6):412-417.

Examples

data(feld1)
par(las = 1, mfrow = c(1, 2))
with(feld1, plot(mattress, room, col = as.numeric(cat)))
with(feld1, plot(logmattress, logroom, col = as.numeric(cat)))

tlm documentation built on May 2, 2019, 2:11 p.m.