Table 2.
Statistical tests of changes in presenteeism and absenteeism at pairs of time points
| Presenteeism | Before Surgery to 6 Months After | Before Surgery to 1 Year After | ||||||||
| N | Mean Before | Mean After | Mean Δ | Rank P-value | N | Mean Before | Mean After | Mean Δ | Rank P-value | |
| Absolute Presenteeism, All Patients | 433 | 81.9 | 89.0 | 7.2 | <0.0001 | 440 | 80.7 | 89.4 | 8.7 | <0.0001 |
| Full Performance (Absolute Presenteeism = 100%) | 433 | 21.2% | 37.2% | 15.9% | <0.0001* | 440 | 20.9% | 36.8% | 15.9% | <0.0001* |
| Absolute Presenteeism, Before Surgery < 100% | 341 | 77.0 | 87.5 | 10.6 | <0.0001 | 348 | 75.6 | 88.1 | 12.5 | <0.0001 |
| Absolute Presenteeism, Before Surgery = 100% | 92 | 100.0 | 94.6 | −5.4 | <0.0001 | 92 | 100.0 | 94.1 | −5.9 | <0.0001 |
|
Absenteeism (28-Day Recall) In the past 4 weeks (28 days), how many days did you… |
Before Surgery to 6 Months After | Before Surgery to 1 Year After | ||||||||
| N | Mean Before | Mean After | Mean Δ | Rank P-value | N | Mean Before | Mean After | Mean Δ | Rank P-value | |
| … miss work because of problems with your physical or mental healt | 4101 | 0.86 | 0.43 | −0.43 | <0.0001 | 409 | 1.15 | 0.68 | −0.47 | <0.0001 |
| … miss work because of problems with a family member’s physical or mental health? | 401 | 0.28 | 0.26 | −0.02 | 0.7262 | 409 | 0.25 | 0.26 | 0.01 | 0.4032 |
| … miss work for any other reason (including vacation)? | 401 | 2.08 | 1.62 | −0.45 | 0.0074 | 409 | 2.08 | 2.40 | 0.33 | 0.0941 |
| … come in early, go home late, work extra from home, or work on your day off? | 399 | 5.99 | 5.41 | −0.58 | 0.2209 | 408 | 6.16 | 5.20 | −0.96 | 0.0829 |
| Absenteeism (7-Day Recall) | Before Surgery to 6 Months After | Before Surgery to 1 Year After | ||||||||
| N | Mean Before | Mean After | Mean Δ | Rank P-value | N | Mean Before | Mean After | Mean Δ | Rank P-value | |
| How many days are you expected to work in a typical 7-day week? | 418 | 4.83 | 4.76 | −0.07 | 0.4457 | 428 | 4.84 | 4.76 | −0.08 | 0.066 |
| How many hours does your employer expect you to work in a typical 7-day week? | 416 | 36.15 | 36.23 | 0.08 | 0.8225 | 425 | 35.83 | 35.91 | 0.08 | 0.3281 |
| About how many hours altogether did you work in the past 7 days? | 418 | 36.36 | 37.35 | 0.99 | 0.122 | 427 | 35.89 | 36.74 | 0.85 | 0.1458 |
| 7-Day Absenteeism Score (hours per month) | 416 | −1.38 | −4.62 | −3.25 | 0.2769 | 423 | −1.10 | −3.43 | −2.32 | 0.3991 |
Note: P-values are from Wilcoxon signed-rank tests, except those with an astericks, which are from two-sample test of proportions.