Table 2.
Blood transfusion and length of stay over 2 days for hospitalisations of early miscarriage, 2005–2016
| Blood Transfusion | Length of stay over 2 days | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| No of hospitalisations for early miscarriage | n | % | Crude incidence rate ratio (95% CI) | Adjusted incidence rate ratio a (95% CI) | n | % | Crude incidence rate ratio (95% CI) | Adjusted incidence rate ratio a (95% CI) | |
| All | 50,538 | 554 | 1.1 | 1810 | 3.6 | ||||
| Year | |||||||||
| 2005–2008 | 17,958 | 143 | 0.8 | 1.0 (ref. group) | 1.0 (ref. group) | 645 | 3.6 | 1.0 (ref. group) | 1.0 (ref. group) |
| 2009–2012 | 17,956 | 182 | 1.0 | 1.3 (1.0–1.6) | 1.3 (1.1–1.7) | 555 | 3.1 | 0.9 (0.8–1.0) | 0.9 (0.8–1.0) |
| 2013–2016 | 14,624 | 229 | 1.6 | 2.0 (1.6–2.4) | 2.0 (1.6–2.4) | 610 | 4.2 | 1.2 (1.0–1.3) | 1.2 (1.0–1.3) |
| Maternal age | |||||||||
| < 25 | 6404 | 75 | 1.2 | 1.0 (ref. group) | 1.0 (ref. group) | 310 | 4.8 | 1.0 (ref. group) | 1.0 (ref. group) |
| 25–29 | 9071 | 78 | 0.9 | 0.7 (0.5–1.0) | 0.7 (0.5–1.0) | 350 | 3.9 | 0.8 (0.7–0.9) | 0.9 (0.7–0.9) |
| 30–34 | 14,697 | 154 | 1.0 | 0.9 (0.7–1.2) | 0.8 (0.6–1.1) | 469 | 3.2 | 0.7 (0.6–0.8) | 0.7 (0.6–0.8) |
| 35–39 | 14,250 | 166 | 1.2 | 1.0 (0.8–1.3) | 0.9 (0.7–1.2) | 465 | 3.3 | 0.7 (0.6–0.8) | 0.7 (0.6–0.8) |
| 40+ | 6116 | 81 | 1.3 | 1.1 (0.8–1.5) | 1.0 (0.7–1.4) | 216 | 3.5 | 0.7 (0.6–0.9) | 0.8 (0.7–0.9) |
| Health insurance | |||||||||
| Private | 8951 | 56 | 0.6 | 1.0 (ref. group) | 1.0 (ref. group) | 200 | 2.2 | 1.0 (ref. group) | 1.0 (ref. group) |
| Public | 41,587 | 498 | 1.2 | 1.9 (1.5–2.5) | 2.5 (1.9–3.3) | 1610 | 3.9 | 1.7 (1.5–2.0) | 1.7 (1.5–2.0) |
| Management | |||||||||
| ERPCb | 22,897 | 427 | 1.9 | 1.0 (ref. group) | 1.0 (ref. group) | 870 | 3.8 | 1.0 (ref. group) | 1.0 (ref. group) |
| Medical treatment | 1404 | 8 | 0.6 | 0.3 (0.2–0.6) | 0.3 (0.1–0.5) | 90 | 6.4 | 1.7 (1.4–2.1) | 1.5 (1.2–1.9) |
| Expectant/other treatment | 26,225 | 119 | 0.5 | 0.2 (0.2–0.3) | 0.3 (0.2–0.4) | 850 | 3.2 | 0.9 (0.8–0.9) | 0.7 (0.6–0.8) |
| Type of early miscarriage | |||||||||
| Complete | 20,700 | 89 | 0.4 | 1.0 (ref. group) | 1.0 (ref. group) | 718 | 3.5 | 1.0 (ref. group) | 1.0 (ref. group) |
| Incomplete | 29,835 | 464 | 1.6 | 3.6 (2.9–4.5) | 1.5 (1.1–2.0) | 1092 | 3.7 | 1.1 (1.0–1.2) | 0.8 (0.7–1.0) |
aAdjusted incidence rate ratio from multivariable analysis including all variables in the table; bERPC Evacuation of retained products of conception