Table 2 Single-Items Missing Values by Mode of Measurement Model and Time
From: A comparison of conventional and retrospective measures of change in symptoms after elective surgery
Model | Point of measurement | Description | Average missing values | |
|---|---|---|---|---|
| Â | Â | Â | Hernia | Gall |
Conventional, Subgroup A | T0 | Measured directly | 23,8% | 20,8% |
Conventional, Subgroup B | T0 | Measured directly | 24,2% | 40,7% |
A | T0 | Perceived at T1 | 23,5% | 33,3% |
B | T0 | Recalled at T1 | 7,9% | 8,4% |
A | T0 | Perceived at T2 | 26,9% | 33,3% |
B | T0 | Recalled at T2 | 8,9% | 10,7% |
A | T1 | Measured directly | 6,8% | 10,7% |
B | T1 | Measured directly | 11,1% | 29,1% |
A | T2 | Measured directly | 7,1% | 9,3% |
B | T2 | Measured directly | 14,9% | 11,6% |