Table 2.
Reasons for missing data
N = 1,033 | |
---|---|
Electrocardiogram (ECG) missing | N = 29 (2.8%) |
Technical/transmission errors | (all) |
| |
Lab assays missing | N = 7 (0.6%) |
Sample contamination | 4 |
Refusal of blood draw | 2 |
Inability to draw blood | 1 |
| |
Neurocognitive tests missing | N = 3 (0.3%) |
Incomplete clinical exam | (all) |
| |
MRI missing | N = 35 (3.4%) |
Deemed ineligible at clinic visit | 22 |
Excess motion/poor image quality | 9 |
Image corruption/data loss | 4 |
| |
Withdrew data after examination | N = 215 (20.8%) |