Table 1.
Descriptive statistics, total population and the two main patient groups
| Population | Variable | Period 1 | Period 2 | Change, % |
|---|---|---|---|---|
|
Total |
Number of days (n) |
315 |
316 |
|
| |
Number of patients (n) |
11 372 |
12 143 |
6.8* |
| |
Case time (hours) |
23 532 |
25 202 |
7.1* |
| |
Out-hours operating (hours) |
5 236 |
5 400 |
3.2 |
|
Elective |
Number of patients (n) |
7 709 |
8 044 |
4.3* |
| |
Case time (hours) |
16 433 |
16 693 |
1.6 |
| |
Overtime (hours) |
494 |
367 |
−26* |
| |
SD case time per day |
1 509 |
1 227 |
|
| |
Number of operating rooms (n) |
17 |
14 |
|
|
Non - elective |
Number of patients (n) |
3 663 |
4 099 |
12* |
| |
Case time (hours) |
7 099 |
8 509 |
20* |
| |
Case time day (hours) |
2 534 |
3 763 |
48.5* |
| |
Case time evening (hours) |
2 156 |
2 337 |
8.4* |
| |
Case time night (hours) |
582 |
440 |
−24.4* |
| |
Case time weekend (hours) |
1 827 |
1 969 |
7.8 |
| |
Day shift, percentage of total case time (%) |
36 |
44 |
|
| |
Evening shift, percentage of total case time (%) |
30 |
27 |
|
| |
Night shift, percentage of total case time (%) |
8 |
5 |
|
| |
Weekend, percentage of total case time (%) |
26 |
23 |
|
| |
Number of nights without surgery (n) |
55 |
112 |
|
| |
SD daily case time (dayshift) |
352 |
281 |
|
|
Total |
Mean utilization 17 OR s (%) |
56 |
- |
|
|
Elective |
Mean utilization 14 OR s (%) |
- |
60 |
|
|
Non - elective |
Mean utilization 3 OR s (%) |
- |
62 |
|
| |
Mean utilization evening (%) |
48 |
52 |
|
| Mean utilization night (%) | 37 | 28 |
Note. *p<0.05. SD = Standard Deviation. Calculations of mean OR utilization on dayshifts include weekdays with elective surgery (n = 221 and 220 in period one and two, respectively). Consequently, a total of 40 hours (period one) and 74 hours (period two) non-elective case time conducted on dayshifts without elective cases is excluded. Mean OR utilization on evenings and nights include all weekdays in the two periods; 225 days and 226 weekdays.