Table 2.
Demographic and clinical data of spine surgery patients
| Parameter | Unit | Total population | Control group | SSI | p value |
|---|---|---|---|---|---|
| Number total | pts | 274 (100%) | 252 (91.97%) | 22 (8.03%) | |
| 2005 | pts | 37 (13.50%) | 33 (13.10%) | 4 (18.18%) | |
| 2006 | pts | 46 (16.79%) | 41 (16.27%) | 5 (22.73%) | |
| 2007 | pts | 34 (12.41%) | 30 (11.90%) | 4 (18.18%) | 0.746 |
| 2008 | pts | 47 (47.15%) | 44 (17.46%) | 3 (13.64%) | |
| 2009 | pts | 57 (20.80%) | 54 (21.43%) | 3 (13.64%) | |
| 2010 | pts | 53 (19.34%) | 50 (19.84%) | 3 (13.64%) | |
| January | pts | 31 (11.31%) | 29 (11.51%) | 2 (9.09%) | |
| February | pts | 18 (6.57%) | 15 (5.95%) | 3 (13.64%) | |
| March | pts | 36 (13.14%) | 35 (13.89%) | 1 (4.55%) | |
| April | pts | 25 (9.12%) | 23 (9.13%) | 2 (9.09%) | |
| May | pts | 20 (7.30%) | 19 (7.54%) | 1 (4.55%) | |
| June | pts | 22 (8.03%) | 20 (7.94%) | 2 (9.09%) | |
| July | pts | 15 (5.47%) | 12 (4.76%) | 3 (13.64%) | |
| August | pts | 27 (9.85%) | 23 (9.13%) | 4 (18.18%) | |
| September | pts | 22 (8.03%) | 21 (8.33%) | 1 (4.55%) | |
| October | pts | 27 (9.85%) | 25 (9.92%) | 2 (9.09%) | |
| November | pts | 21 (7.66%) | 20 (7.94%) | 1 (4.55%) | |
| December | pts | 10 (3.65%) | 10 (3.97%) | 0 (0.00%) | |
| Cold season | pts | 210 (76.64%) | 197 (78.17%) | 13 (59.09%) | |
| Warm season | pts | 64 (23.36%) | 55 (21.83%) | 9 (40.91%) | 0.042 |
| Age | pts | 54.06±12.89 | 56.59±13.18 | 0.374 | |
| Male | pts | 145 (52.92%) | 132 (52.38%) | 13 (59.09%) | 0.545 |
| Weight | kg | 80.72±14.94 | 79.36±15.05 | 0.668 | |
| BMI | 27.48±4.00 | 27.69±4.17 | 0.878 | ||
| NICU stay | day | 1.61±1.10 | 1.32±1.51 | 0.043 | |
| Hospital stay | day | 8.65±5.92 | 11.55±6.35 | 0.094 | |
| Spine diagnoses | |||||
| Degenerative | pts | 247 (90.15%) | 227 (90.08%) | 20 (90.91%) | |
| Tumour | pts | 21 (7.66%) | 19 (7.54%) | 2 (9.09%) | 0.745 |
| Trauma | pts | 6 (2.19%) | 6 (2.19%) | 0 (0.00%) | |
| Diabetes mellitus | pts | 33 (12.04%) | 30 (11.90%) | 3 (13.64%) | 0.811 |
| Ulcer prophylaxis | pts | 56 (20.44%) | 53 (21.03%) | 3 (13.64%) | 0.409 |
| Omeprazole | pts | 50 (18.25%) | 47 (18.65%) | 3 (13.64%) | 0.559 |
BMI body mass index, NICU neurointensive care unit. Warm season—June to August; cold season—January to May, September to December