problem3.10: problem3.10

In nganbaohuynh/stat210: Datasets for the course STAT210 (NMBU)

problem3.10

Description

Data from Exercise 3.10 in "Montgomery, D. Design and Analysis of Experiments. 9th Ed. Wiley."

Usage

problem3.10

Format

An article described a randomized, double-blind, sham-controlled, feasibility and dosing study to determine if a common pulsing electromagnetic field (PEMF) treatment could moderate the substantial osteopenia that occurs after forearm disuse. Subjects were randomized into 4 groups after a distal radius fracture, or carpal surgery requiring immobilization in a cast. Active or identical sham PEMF transducers were worn on the distal forearm for 1, 2, or 4 h/day for 8 weeks starting after cast removal ("baseline") when bon density continues to decline. Bone mineral density (BMD) and bone geometry were measured in the distal forearm by dual energy X-ray absortiometry (DXA) and peripheral quantitative computed tomography (pQCT). The data are the percent losses in BMD measurements on the radius after 16 weeks for patients wearing the active or sham PEMF transducers for 1, 2, or 4 h/day (data were constructed to match the means and standard deviations read from a graph in the paper)

Examples

summary(problem3.10)

nganbaohuynh/stat210 documentation built on Aug. 20, 2022, 10:08 p.m.