Table 2.
Changes per quarter (average of 2017–2019) in relation to 2020, RRD: relative rate difference (≙ incidence rate ratio) in percent
| Type of surgery | 17–19/1 | 2020/1 | RRD% (p-value) | 17–19/2 | 2020/2 | RRD% (p-value) | 17–19/3 | 2020/3 | RRD% (p-value) | 17–19/4 | 2020/4 | RRD% (p-value) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Upper GI | 47 | 46 | − 3% (0.445) | 45 | 31 | − 31% (0.050) | 48 | 52 | 7 (0.360) | 40 | 39 | − 3.7% (0.441) |
| Colorectal | 98 | 99 | 0.4% (0.490) | 83 | 73 | − 13% (0.200) | 104 | 73 | − 31% (0.008) | 87 | 58 | − 34% (0.007) |
| HPB | 75 | 95 | + 30% (0.068) | 82 | 63 | − 24% (0.053) | 78 | 92 | 15 (0.154) | 78 | 65 | − 18% (0.129) |
| Peritoneal | 4 | 3 | − 25% (0.360) | 4 | 2 | − 50% (0.224) | 4 | 4 | ± 0 (0.495) | 4 | 6 | 32% (0.278) |
| Endocrine | 8 | 12 | 33% (0.195) | 10 | 8 | − 25% (0.318) | 11 | 6 | − 44% (0.115) | 12 | 0 | – |
| All surgeries | 232 | 256 | + 9% (0.156) | 221 | 177 | − 20% (0.011) | 247 | 235 | − 6% (0.263) | 218 | 169 | − 23% (0.005) |
Means were rounded to the nearest whole number