Table 2.
Weekly volumes and interrupted time series regression results by procedure.
| Pre-COVID | EP | Recovery | Postrecovery | |||||
|---|---|---|---|---|---|---|---|---|
| Surgery | Median (range) | Median (range) | IRR (95% CI) | Median (range) | IRR (95% CI) | Median (range) | IRR (95% CI) | P-valuea |
| EL | 17 (8–29) | 16 (12–26) | 1.108 (0.936–1.310) | 22 (15–35) | 1.468 (1.260–1.712) | 20 (11–32) | 1.517 (1.245–1.852) | 2.01 × 10–5 |
| Emergency CS | 7 (2–13) | 8 (0–10) | 0.948 (0.729–1.227) | 7 (3–14) | 0.985 (0.774–1.254) | 5 (0–11) | 0.792 (0.581–1.083) | .024 |
| Emergency OF fixation | 1 (0–6) | 1 (0–5) | 0.630 (0.336–1.154) | 1 (0–5) | 0.666 (0.384–1.151) | 1 (0–4) | 0.476 (0.237–0.965) | .371 |
Pre-COVID (Jan. 2018—Jan. 2020), EP (Feb.—May 2020), Recovery (Jun.—Nov. 2020), Postrecovery (Dec. 2020—Dec. 2021). Bold indicates statistically significant associations.
Abbreviation: IRR: incidence rate ratio.
a
From Kruskal–Wallis tests comparing distributions of weekly counts across the four time periods.