Table 2 Overview of observed variables with number of horses (n) and missing observations in each variable in a retrospective study of 297 colic surgeries in Norway 2005 - 2011
From: Surgical treatment of equine colic - a retrospective study of 297 surgeries in Norway 2005–2011
Variable | n | Missing (%) |
|---|---|---|
Prior to admission | ||
Duration of signs (hours) | 271 | 26 (8.8) |
Transport time (minutes) | 292 | 5 (1.7) |
Preoperative variables | ||
Heart rate (beats\minute) | 271 | 26 (8.8) |
Respiration rate (elevated\not elevated) | 151 | 146 (49.2) |
Rectal temperature (˚celsius) | 167 | 130 (43.8) |
Capillary refill time (seconds) | 227 | 70 (23.6) |
Mucosal membranes (appearance) | 268 | 29 (9.8) |
Normal, pale, toxic, cyanotic or sligthly abnormal | ||
Rectal examination | 235 | 62 (20.9) |
Normal, impaction of large intestine, displaced colon, tympanic colon or distended small intestine | ||
Borborygmia | 237 | 60 (20.2) |
None, reduced, normal, increased or tympanic | ||
Nasogastric reflux (positive\negative) | 155 | 142 (47.8) |
Hematocrit | 251 | 46 (15.5) |
Total solids in plasma (gram\litre) | 246 | 51 (17.2) |
Lactate in blood (mmol\litre) | 153 | 144 (48.5) |
Intraoperative variables | ||
Anesthesia duration (minutes)* | 187 | 32 (10.7) |
Enterotomy (performed\not performed)* | 219 | 0 (0.0) |
Intestinal resection (performed\not performed)* | 219 | 0 (0.0) |
Anesthetist | 244 | 53 (17.8) |
Primary surgeon | 286 | 11 (3.7) |
Secondary surgeon | 210 | 87 (29.3) |
Surgeon board-certification (yes\no) | 294 | 3 (1.0) |
Daytime vs. out-of-hours | 283 | 14 (4.7) |
Postoperative variables | ||
Hospitalisation duration (days)* | 218 | 1 (0.4) |