d017 <- read.table(here::here("data", "PRESSURE.txt"), header = TRUE)D017. Combination of three types of treatments on hypertension
The data file can be downloaded here:
This dataset is associated with a study in which the effects of three types of treatments for hypertension where investigated (Landau and Everitt 2004). The three treatments correspond to a medication (drug; medication X, Y, or Z), a psychological feedback (biofeed; present or absent), and a diet (diet; given or not given). All 12 combinations of the three treatments were included in a \(3 \times 2 \times 2\) design. Seventy-two subjects suffering from hypertension were recruited to the study, with 6 being randomly allocated to each of the 12 treatment combinations. Blood pressure measurements were made on each subject after treatments (pressure).
| drug | biofeed | diet | pressure |
|---|---|---|---|
| X | Absent | No | 173 |
| X | Absent | No | 194 |
| X | Absent | No | 197 |
| X | Absent | No | 190 |
| X | Absent | No | 176 |
| X | Absent | No | 198 |
| X | Absent | Yes | 164 |
| X | Absent | Yes | 190 |