Table 2.
Outcomes according to surgical approach, year of registration and age group
| Subgroup | No. (%)a | Incidenceb | Length of stay in days | Hospital costs in euros | ||
|---|---|---|---|---|---|---|
| Mean ± SD | Median (IQR) | Mean ± SD | Median (IQR) | |||
| By year of registration and surgical approach | ||||||
| All cases | ||||||
| 2006 | 14 651 (11) | 90 | 4.08 ± 4.45 | 3 (2–5) | 4517 ± 1951 | 4950 (4325–5510) |
| 2007 | 14 161 (11) | 87 | 3.75 ± 3.77 | 3 (2–5) | 3061 ± 1054 | 3085 (2720–3640) |
| 2008 | 13 851 (10) | 84 | 3.91 ± 3.57 | 3 (2–5) | 3636 ± 476 | 3455 (3450–4030) |
| 2009 | 14 015 (10) | 85 | 3.75 ± 3.40 | 3 (2–4) | 3835 ± 503 | 3725 (3555–4125) |
| 2010 | 13 179 (10) | 80 | 3.69 ± 3.47 | 3 (2–4) | 3436 ± 453 | 3430 (3280–3555) |
| 2011 | 12 516 (9) | 75 | 3.46 ± 3.25 | 2 (2–4) | 3534 ± 776 | 3850 (3350–3850) |
| 2012 | 12 615 (9) | 75 | 3.37 ± 3.36 | 2 (2–4) | 3708 ± 1433 | 3525 (3030–3980) |
| 2013 | 12 754 (10) | 76 | 3.53 ± 3.26 | 2 (2–4) | 3886 ± 1261 | 3710 (3475–4070) |
| 2014 | 14 137 (11) | 84 | 3.46 ± 3.08 | 2 (2–4) | 3776 ± 1399 | 3850 (3510–4155) |
| 2015 | 13 146 (10) | 78 | 3.50 ± 3.23 | 2 (2–4) | 3556 ± 1796 | 3860 (3565–4115) |
| Open procedures | ||||||
| 2006 | 11 016 (75) | 4.17 ± 4.67** | 3 (2–5) | 4423 ± 1945*** | 4865 (4275–5410) | |
| 2007 | 10 007 (71) | 3.80 ± 3.87 | 3 (2–5) | 2853 ± 964*** | 2905 (2645–3215) | |
| 2008 | 9 044 (65) | 4.06 ± 3.79*** | 3 (2–5) | 3438 ± 424*** | 3455 (3440–3455) | |
| 2009 | 8 178 (58) | 3.85 ± 3.57** | 3 (2–4) | 3590 ± 437*** | 3555 (3555–3555) | |
| 2010 | 6 778 (51) | 3.77 ± 3.56* | 3 (2–4) | 3275 ± 408*** | 3280 (3260–3280) | |
| 2011 | 5 672 (45) | 3.54 ± 3.38 | 2 (2–4) | 3260 ± 685*** | 3350 (3350–3370) | |
| 2012 | 5 104 (41) | 3.52 ± 3.64** | 2 (2–4) | 3733 ± 1495 | 3530 (3105–3980) | |
| 2013 | 4 381 (34) | 3.70 ± 3.53** | 2 (2–5) | 3906 ± 1407 | 3705 (3460–4040) | |
| 2014 | 4 133 (29) | 3.58 ± 3.27* | 2 (2–4) | 3833 ± 1560* | 3835 (3530–4115) | |
| 2015 | 3 131 (24) | 3.80 ± 3.52*** | 2 (2–5) | 3613 ± 2119 | 3905 (3570–4115) | |
| Minimally invasive | ||||||
| 2006 | 3 693 (25) | 3.85 ± 3.76** | 3 (2–5) | 4794 ± 1939*** | 5105 (4520–5835) | |
| 2007 | 4 239 (30) | 3.63 ± 3.53 | 3 (2–4) | 3563 ± 1088*** | 3680 (3245–4075) | |
| 2008 | 4 886 (35) | 3.65 ± 3.14*** | 3 (2–4) | 4007 ± 319*** | 4030 (4030–4030) | |
| 2009 | 5 942 (42) | 3.61 ± 3.16** | 3 (2–4) | 4176 ± 372*** | 4125 (4125–4125) | |
| 2010 | 6 455 (49) | 3.61 ± 3.36* | 2 (2–4) | 3606 ± 433*** | 3555 (3510–3630) | |
| 2011 | 6 881 (55) | 3.41 ± 3.14 | 2 (2–4) | 3760 ± 774*** | 3850 (3850–3850) | |
| 2012 | 7 532 (60) | 3.27 ± 3.15** | 2 (2–4) | 3692 ± 1390 | 3510 (3030–3980) | |
| 2013 | 8 395 (66) | 3.45 ± 3.11** | 2 (2–4) | 3875 ± 1176 | 3715 (3495–4095) | |
| 2014 | 10 013 (71) | 3.41 ± 3.00* | 2 (2–4) | 3753 ± 1326* | 3870 (3490–4160) | |
| 2015 | 10 031 (76) | 3.42 ± 3.16*** | 2 (2–4) | 3542 ± 1719 | 3830 (3550–4120) | |
| By age group and surgical approach | ||||||
| All cases | ||||||
| 0–9 | 10 237 (8) | 54 | 3.79 ± 3.57 | 3 (2–5) | 3652 ± 1401 | 3555 (3300–4085) |
| 10–19 | 36 466 (27) | 182 | 3.40 ± 3.13 | 2 (2–4) | 3698 ± 1299 | 3620 (3350–4085) |
| 20–29 | 25 595 (19) | 126 | 3.08 ± 2.65 | 2 (2–3) | 3709 ± 1170 | 3715 (3390–4125) |
| 30–39 | 19 652 (15) | 90 | 3.28 ± 2.99 | 2 (2–4) | 3710 ± 1270 | 3690 (3370–4125) |
| 40–49 | 16 444 (12) | 64 | 3.66 ± 3.21 | 3 (2–5) | 3710 ± 1218 | 3675 (3360–4115) |
| 50–59 | 12 703 (9) | 55 | 4.20 ± 4.04 | 3 (2–5) | 3709 ± 1303 | 3650 (3350–4085) |
| 60–69 | 8 363 (6) | 45 | 4.72 ± 4.72 | 4 (2–6) | 3700 ± 1379 | 3620 (3350–4075) |
| 70–79 | 4 038 (3) | 36 | 5.77 ± 5.61 | 4 (2–7) | 3707 ± 1529 | 3615 (3350–4080) |
| ≥ 80 | 1 527 (1) | 23 | 7.53 ± 6.99 | 6 (3–9) | 3627 ± 1373 | 3555 (3280–4030) |
| Open procedures | ||||||
| 0–9 | 7 654 (75) | 3.76 ± 3.52 | 3 (2–5) | 3573 ± 1387 | 3485 (3485–3910) | |
| 10–19 | 19 324 (53) | 3.45 ± 3.18 | 3 (2–4) | 3575 ± 1287 | 3455 (3280–3870) | |
| 20–29 | 10 511 (41) | 3.16 ± 2.70 | 2 (2–4) | 3566 ± 1216 | 3455 (3280–3900) | |
| 30–39 | 8 749 (45) | 3.41 ± 3.11 | 3 (2–4) | 3557 ± 1318 | 3455 (3280–3925) | |
| 40–49 | 7 560 (46) | 3.86 ± 3.49 | 3 (2–5) | 3597 ± 1291 | 3460 (3280–3980) | |
| 50–59 | 6 142 (48) | 4.49 ± 4.58 | 3 (2–6) | 3619 ± 1381 | 3485 (3280–3950) | |
| 60–69 | 4 268 (51) | 5.01 ± 5.36 | 4 (2–6) | 3646 ± 1446 | 3485 (3280–3915) | |
| 70–79 | 2 252 (56) | 6.21 ± 6.07 | 5 (3–8) | 3640 ± 1454 | 3490 (3280–3970) | |
| ≥ 80 | 984 (64) | 8.13 ± 7.59 | 6 (4–10) | 3591 ± 1436 | 3455 (3245–3970) | |
| Minimally invasive | ||||||
| 0–9 | 2 597 (25) | 3.89 ± 3.69 | 3 (2–5) | 3891 ± 1419 | 3960 (3555–4185) | |
| 10–19 | 17 255 (47) | 3.34 ± 3.08 | 2 (2–4) | 3838 ± 1322 | 3850 (3555–4125) | |
| 20–29 | 15 169 (59) | 3.03 ± 2.63 | 2 (2–3) | 3809 ± 1126 | 3850 (3555–4125) | |
| 30–39 | 10 978 (56) | 3.20 ± 2.93 | 2 (2–4) | 3834 ± 1215 | 3850 (3555–4125) | |
| 40–49 | 8 977 (55) | 3.50 ± 2.94 | 2 (2–4) | 3804 ± 1144 | 3850 (3550–4125) | |
| 50–59 | 6 614 (52) | 3.94 ± 3.47 | 3 (2–5) | 3792 ± 1218 | 3850 (3535–4125) | |
| 60–69 | 4 130 (49) | 4.44 ± 3.92 | 3 (2–6) | 3758 ± 1301 | 3850 (3510–4125) | |
| 70–79 | 1 799 (45) | 5.24 ± 4.91 | 4 (2–6) | 3796 ± 1614 | 3840 (3515–4125) | |
| ≥ 80 | 548 (36) | 6.47 ± 5.64 | 5 (3–8) | 3687 ± 1250 | 3850 (3510–4125) | |
SD standard deviation, IQR interquartile range
*p < 0.05, **p < 0.001 and ***p < 0.0001 for the difference in outcome between open versus minimally invasive appendectomy
aNumbers of open and minimally invasive procedures may not add up to the total numbers in this column owing to 486 double procedure registries. Percentages have been rounded and may not total 100
bIncidence rates are presented per 100,000 inhabitants