Table 2 Maternal and fetal characteristics, selected outcome measures by delivery hospital category and daily delivery volume categorisation
Delivery hospital category | Maternal and fetal characteristics and studied outcomes | Categorisation | Quiet day | Optimal day | Busy day |
|---|---|---|---|---|---|
C1 | Maternal age (n, %) | < 25 | 1438 (19.9) | 9225 (20.9) | 886 (21.2) |
25–34 | 4465 (61.9) | 27,039 (61.4) | 2522 (60.3) | ||
≥35 | 1309 (18.2) | 7792 (17.7) | 772 (18.5) | ||
Parity (n, %) | Nulliparous | 2788 (38.7) | 16,339 (37.1) | 1513 (36.2) | |
Birthweight (n, %) | < 3000 | 909 (12.6) | 5329 (12.1) | 475 (11.4) | |
3000–3999 | 5078 (70.4) | 31,126 (70.7) | 2952 (70.6) | ||
≥4000 | 1224 (17.0) | 7586 (17.2) | 753 (18.0) | ||
Outcome (n, %) | Unplanned CS*** | 748 (10.4) | 3953 (9.0) | 311 (7.4) | |
Instrumental delivery | 524 (7.3) | 3317 (7.5) | 294 (7.0) | ||
Induction*** | 1608 (22.3) | 9254 (21.0) | 783 (18.7) | ||
EA | 2478 (34.4) | 15,398 (35.0) | 1381 (33.0) | ||
C2 | Maternal age (n, %) | < 25 | 2732 (19.2) | 26,565 (19.4) | 2815 (19.2) |
25–34 | 8938 (62.9) | 86,463 (63.2) | 9259 (63.1) | ||
≥35 | 2530 (17.8) | 23,683 (17.3) | 2588 (17.7) | ||
Parity (n, %) | Nulliparous | 5705 (40.2) | 54,747 (40.0) | 5781 (39.4) | |
Birthweight (n, %) | < 3000 | 1936 (13.6) | 17,695 (12.9) | 1913 (13.1) | |
3000–3999 | 9854 (69.4) | 95,316 (69.7) | 10,120 (69.0) | ||
≥4000 | 2408 (17.0) | 23,678 (17.3) | 2625 (17.9) | ||
Outcome (n, %) | Unplanned CS*** | 1415 (10.0) | 12,440 (9.1) | 1267 (8.6) | |
Instrumental delivery | 1237 (8.7) | 11,984 (8.8) | 1197 (8.2) | ||
Induction*** | 2632 (18.5) | 25,100 (18.4) | 2437 (16.6) | ||
EA*** | 5659 (39.9) | 54,711 (40.0) | 5580 (38.1) | ||
C3 | Maternal age (n, %) | < 25 | 1092 (20.6) | 8310 (19.5) | 1248 (19.0) |
25–34 | 3316 (62.5) | 26,870 (62.9) | 4184 (63.7) | ||
≥35 | 895 (16.9) | 7518 (17.6) | 1141 (17.4) | ||
Parity (n, %) | Nulliparous *** | 2044 (38.5) | 16,485 (38.6) | 2583 (39.3) | |
Birthweight (n, %) | < 3000 *** | 585 (11.0) | 5110 (12.0) | 863 (13.1) | |
3000–3999*** | 3636 (68.6) | 29,468 (69.1) | 4569 (69.6) | ||
≥4000*** | 1082 (20.4) | 8096 (19.0) | 1135 (17.3) | ||
Outcome (n, %) | Unplanned CS | 561 (10.6) | 4563 (10.7) | 683 (10.4) | |
Instrumental delivery | 433 (8.2) | 3743 (8.8) | 556 (8.5) | ||
Induction*** | 1522 (28.7) | 10,329 (24.2) | 1125 (17.1) | ||
EA | 1631 (30.8) | 13,636 (31.9) | 2083 (31.7) | ||
C4 | Maternal age (n, %) | < 25*** | 1182 (12.1) | 11,331 (12.9) | 1227 (11.8) |
25–34*** | 6428 (66.1) | 57,858 (65.6) | 6668 (64.3) | ||
≥35*** | 2121 (21.8) | 18,967 (21.5) | 2472 (23.8) | ||
Parity (n, %) | Nulliparous*** | 4103 (42.2) | 41,445 (47.0) | 5115 (49.3) | |
Birthweight (n, %) | < 3000*** | 1071 (11.0) | 10,793 (12.3) | 1401 (13.5) | |
3000–3999*** | 6924 (71.4) | 62,362 (70.9) | 7371 (71.2) | ||
≥4000*** | 1706 (17.6) | 14,744 (16.8) | 1587 (15.3) | ||
Outcome (n, %) | Unplanned CS*** | 835 (8.6) | 8410 (9.5) | 1084 (10.5) | |
Instrumental delivery *** | 796 (8.2) | 8827 (10.0) | 1155 (11.1) | ||
Induction*** | 1698 (17.4) | 17,201 (19.5) | 2604 (21.1) | ||
EA*** | 4236 (43.5) | 38,923 (44.2) | 5760 (55.6) | ||
C5 | Maternal age (n, %) | < 25*** | 4530 (18.4) | 27,935 (16.3) | 3138 (14.5) |
25–34*** | 15,168 (61.1) | 108,552 (63.4) | 13,879 (64.1) | ||
≥35*** | 4915 (20.0) | 34,661 (20.3) | 4620 (21.4) | ||
Parity (n, %) | Nulliparous*** | 10,328 (42.0) | 72,826 (42.6) | 9620 (44.5) | |
Birthweight (n, %) | < 3000*** | 4017 (16.3) | 26,115 (15.3) | 3334 (15.4) | |
3000–3999*** | 16,694 (67.8) | 115,890 (67.7) | 14,708 (68.1) | ||
≥4000*** | 3895 (15.8) | 29,051 (17.0) | 3565 (16.5) | ||
Outcome (n, %) | Unplanned CS | 2499 (10.2) | 17,240 (10.1) | 2277 (10.5) | |
Instrumental delivery*** | 1865 (7.6) | 14,560 (8.5) | 1871 (8.6) | ||
Induction | 5091 (20.7) | 34,106 (19.9) | 4241 (19.6) | ||
EA*** | 11,736 (47.7) | 80,655 (47.1) | 10,484 (48.5) |