Descriptive statistics for continuous variables at baseline for intervention and control groups
| Variable | Intervention (n=56) | Control (n=53) | p Value | ||
|---|---|---|---|---|---|
| Mean | 95% CI | Mean | 95% CI | ||
| Individual risk factors | |||||
| Age | 43 | 40.0 to 47.0 | 44 | 40.0 to 47.0 | 0.92 |
| Mechanical/temporal loads | |||||
| Hours/week on keyboard | 21 | 18.0 to 23.0 | 23 | 21.0 to 26.0 | 0.19 |
| Hours/week on mouse | 22 | 20.0 to 25.0 | 25 | 23.0 to 28.0 | 0.19 |
| Hours on computer without break | 2.3 | 2.0 to 2.5 | 2.0 | 1.8 to 2.2 | 0.14 |
| Years worked in job title | 6.2 | 4.4 to 8.0 | 7.5 | 5.6 to 9.4 | 0.32 |
| Years worked at agency | 9.8 | 7.7 to 11.9 | 10.4 | 8.1 to 12.7 | 0.70 |
| Daily hours telephone use | 1.9 | 1.5 to 2.3 | 1.8 | 1.6 to 2.1 | 0.87 |
| Years of computer use | 21.8 | 20.1 to 23.4 | 20.6 | 19.0 to 22.2 | 0.31 |
| Psychosocial exposures | |||||
| Linear job strain* | 67.5 | 65.6 to 69.4 | 68.4 | 66.7 to 70.1 | 0.48 |
*Alternative formulation of job strain from the Job Content Questionnaire.