Among the nine trials comparing combined diet and exercise interventions [ 20, 25, 28, 32, 33, 36– 38] with standard care, attrition rates varied widely.
They seem to like working for TCS: it has an unusually low (by Indian standards) employee attrition rate of about 6.5% a year.
He doesn't expect the impending changes to be like the upheaval in 2012, but more like standard newsroom downsizing through attrition and sending existing staffers to different beats.
Consequently, a standard method of measuring attrition behavior in DSME is difficult to define and currently nonexistent.
b) Midwife outcomes (compared to midwives providing standard care) - staff attrition from the model of care and the hospital; - work satisfaction; - burnout.
Therefore, a study with a similar attrition rate, standard deviation, cluster (unit) sizes, interclass correlation coefficient (ICC), analysis method and design, but with nine clusters per arm, would have a standard error of difference of approximately 5.1√(5/9) = 3.8.
Information about the treatment and control differences, attrition rate, standard deviation and the interclass correlation coefficient that is needed for a sample size calculation in a subsequent randomized controlled trial.
Using step 1, we conclude that, with at least 15 units/arm, along with an attrition rate, standard deviation, cluster (or unit) size, and an ICC (for patients within a unit) similar to those of Chenoweth et al. [ 43], we would have 80% power to detect a true difference of 10.9 between the treatment group and the control group.
On a like-for-like basis, except for parts of the US, our entry standards are the lowest; attrition rates the highest; our profession the most over-managed, demoralised and unhappy.
Based on the findings of the current study, we calculate that a total sample size of 60 would be required to detect a mean difference in WebNeuro stress score of 0.8 between the TM and wait-list control groups (assuming a standard deviation of 1.6, 10%% attrition, a two-tailed alpha level of 0.01, and 90%% power for a two-way repeated measures analysis of variance).
Limitations include large attrition rates in the standard care group (48% attrition rate), though this was similar in all groups.
