Table 2 Characteristics of the Sygen cohort for the variables of interest, before and after selecting for complete cases
From: Studying missingness in spinal cord injury data: challenges and impact of data imputation
Entire cohort | Complete cases only | p-value | ||
|---|---|---|---|---|
Number of patients | n | 797 | 546 | |
Sex | 0.42 | |||
n (% male) | 643 (80.7) | 433 (79.3) | ||
NA, n (%) | 0 (0.0) | 0 (0.0) | ||
Age | 1 | |||
mean (SD) | 32.5 (13.4) | 32.00 (13.3) | ||
NA, n (%) | 0 (0.0) | 0 (0.0) | ||
LEMS at week 01 | 1 | |||
mean (SD) | 2.7 (7.2) | 2.7 (7.1) | ||
median [Q1-Q3] | 0 [0–0] | 0 [0–0] | ||
NA, n (%) | 74 (9.3) | 0 (0.0) | ||
LEMS at week 26 | 1 | |||
mean (SD) | 12.1 (18.7) | 11.9 (18.9) | ||
median [Q1-Q3] | 0 [0–29] | 0 [0–28] | ||
NA, n (%) | 168 (21.1) | 27 (4.9) | ||
LEMS at week 52 | 1 | |||
mean (SD) | 12.8 (19.3) | 12.6 (19.3) | ||
median [Q1-Q3] | 0 [0–32] | 0 [0–31] | ||
NA, n (%) | 192 (24.1) | 0 (0.0) | ||
Level of injury | 0.62 | |||
Cervical, n (%) | 600 (75.3) | 406 (74.4) | ||
Thoracic, n (%) | 197 (24.7) | 140 (25.6) | ||
AIS grade | 0.84 | |||
A, n (%) | 446 (56.0) | 356 (65.2) | ||
B, n (%) | 77 (9.7) | 59 (10.8) | ||
C, n (%) | 149 (18.7) | 108 (19.8) | ||
D, n (%) | 31 (3.9) | 23 (4.2) | ||
NA, n (%) | 94 (11.8) | 0 (0.0) | < 0.001 |