Table 1.
Missing Data From the Final Data Set of 678 Patients
| Variable | Missing, n (%) |
|---|---|
| Education | 54 (7.96) |
| Race | 55 (8.11) |
| Charlson comorbiditya | 92 (13.60) |
| Frailtyb | 61 (9.00) |
| 3-word memoryc | 29 (4.28) |
| Surgery type | 92 (13.60) |
| Clock commandd | 0 (0) |
| Clock copye | 0 (0) |
a
Charlson comorbidity index (range, 0–30; 30 = worse).15
b
Frailty = frailty categorical cut scores and total score Fried et al.17
c
3-word = 3-word memory delay number of words recalled, words from Folstein et al.25
d
Clock command = clock drawing to command condition scored with Montreal Cognitive Assessment clock criteria.27
e
Clock copy = clock drawing to copy condition scored with Montreal Cognitive Assessment clock criteria.24