Table 1. Comparison of clinical and surgical characteristics between the two groups that underwent arthrodesis with a posterior approach.
| Variables | Non-ICS (n=15/35, 7%) | ICS (n=27/64, 3%) | P |
|---|---|---|---|
| Age (years) | 17.40±4.90 | 18.74±5.33 | 0.259a |
| Sex (%) | 0.938b | ||
| Female | 13 (34.2) | 25 (65.8) | – |
| Male | 2 (50.0) | 2 (50.0) | – |
| Weight (kg) | 47.83±8.82 | 54.31±12.52 | 0.093a |
| Postop drainage | 886.67±407.53 | 859.63±388.38 | 0.487a |
| Vol. salvaged in intra-op (mL) | – | 657.14±406.52 | |
| Transfusion (operative) (U/p)* (%) | 0.002c | ||
| 0 | 3 (16.7) | 15 (83.3) | |
| 1 | 2 (18.2) | 9 (81.8) | |
| 2 | 4 (66.7) | 2 (33.3) | |
| 3 to 4 | 6 (85.7) | 1 (14.3) | |
| Transfusion (postoperative) (U/p)# (%) | 0.40c | ||
| 0 | 5 (23.8) | 16 (76.2) | |
| 1 | 5 (50.0) | 5 (50.0) | |
| 2 | 3 (27.3) | 8 (72.7) | |
| 3–9 | 2 (66.7) | 1 (33.3) | |
| Surgical time (min) | 357.0±74.44 | 337.59±62.77 | 0.374d |
a, Mann-Whitney test; b, Chi-Square test; c, likelihood ratio; d, Student’s t test. *, number of units of red blood cells transfused per patient during surgery; #, number of units of red blood cells transfused per patient post-operatively.