TABLE 1.
Demographic Characteristics of Participants
| Participants (N=206) | |||
|---|---|---|---|
| Characteristics | dNCR (N=42) | Non-dNCR (N=164) | P |
| Age, M (IQR) (y) | 69.00 (66.00, 77.00) | 67.00 (63.00, 72.00) | 0.028 |
| Male, n (%) | 28 (0.67) | 112 (0.68) | 0.987 |
| Education, M (IQR) (y) | 9.00 (6.00, 9.00) | 9.00 (6.00, 10.50) | 0.266 |
| BMI, M (IQR), (kg/m2) | 24.22 (21.80, 26.46) | 24.16 (22.10, 26.57) | 0.756 |
| Follow-up, M (IQR), (d) | 7.00 (6.25, 9.00) | 7.00 (6.00, 8.00) | 0.294 |
| Preoperative MMSE, M (IQR), score | 26.50 (24.00, 28.00) | 27.00 (25.00, 29.00) | 0.040 |
| Stroke, n (%) | 6 (0.14) | 16 (0.09) | 0.570 |
| Hypertension, n (%) | 18 (0.43) | 70 (0.43) | 1 |
| Diabetes mellitus, n (%) | 7 (0.17) | 19 (0.12) | 0.532 |
| Coronary disease, n (%) | 2 (0.05) | 23 (0.14) | 0.169 |
| Alcohol problem, n (%) | 5 (0.12) | 20 (0.12) | 1 |
| Smoking, n (%) | 8 (0.19) | 35 (0.21) | 0.910 |
| Length of anesthesia, M (IQR) (min) | 185.00 (160.00, 250.00) | 190.00 (140.00, 245.00) | 0.451 |
| Length of surgery, M (IQR) (min) | 150.00 (130.00, 223.75) | 160.00 (118.75, 210.00) | 0.532 |
| OI at baseline (M, IQR), score | 7.00 (1.25, 9.00) | 10.00 (8.00, 11.00) | <0.001 |
| OI at 1 wk (M, IQR), score | 8.00 (2.25, 10.00) | 10.00 (8.00, 11.00) | <0.001 |
| OT at baseline (M, IQR), score | 6.00 (3.25, 8.00) | 7.00 (5.00, 9.00) | 0.015 |
| OT at 1 wk (M, IQR), score | 5.00 (3.00, 6.75) | 6.00 (4.00, 9.00) | 0.001 |
Mann-Whitney U test was used to compare the nonnormally distributed continuous variables and the Pearson χ2 test was used to compare categorical variables.
P values refer the difference between dNCR cohort and non-dNCR cohort.
BMI indicates body mass index; IQR, interquartile range, 25%–75%; M, median.