Table 1.
Maternal and foetal characteristics of pregnancies with foetuses alive (n = 844) at mother's admission for delivery
| Region | |||||||
|---|---|---|---|---|---|---|---|
| Stockholm | Uppsala | Linköping | Lund | Göteborg | Örebro | Umeå | |
| n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | |
| Maternal characteristics | |||||||
| Total number of pregnancies | 187 | 128 | 62 | 121 | 147 | 23 | 78 |
| Non-Nordic origin | 27 (14) | 15 (12) | 4 (6.5) | 11 (9.1) | 15 (10) | 1 (4.3) | 8 (10) |
| Age* (years), median [range] | 32 [14–45] | 32 [17–45] | 32 [19–43] | 29 [16–43] | 31 [17–43] | 28 [15–38] | 31 [18–46] |
| Age <20 years | 3 (1.6) | 7 (5.5) | 3 (4.8) | 6 (5.0) | 3 (2.0) | 3 (13) | 1 (1.3) |
| Age ≥35 years | 68 (36) | 39 (30) | 14 (23) | 33 (27) | 37 (25) | 1 (4.3) | 24 (31) |
| Smoking† | 18 (9.6) | 21 (16) | 9 (14) | 17 (14) | 17 (12) | 0 (0.0) | 9 (12) |
| Parity 0 | 119 (64) | 79 (62) | 38 (61) | 65 (54) | 86 (58) | 17 (74) | 42 (54) |
| Parity 3+ | 8 (4.3) | 12 (9.4) | 4 (6.5) | 3 (2.5) | 10 (6.8) | 0 (0.0) | 7 (9.0) |
| Any pregnancy complication‡ | 105 (56) | 75 (59) | 34 (55) | 88 (73) | 92 (63) | 12 (52) | 48 (62) |
| Foetal characteristics | |||||||
| Total number of foetuses | 213 | 147 | 69 | 142 | 161 | 26 | 86 |
| Male gender* | 115 (54) | 87 (59) | 29 (42) | 79 (54) | 81 (50) | 22 (85) | 49 (57) |
| Multiple pregnancy | 50 (24) | 38 (26) | 14 (20) | 38 (27) | 28 (17) | 5 (19) | 16 (19) |
*
p < 0.05 among regions; other variables not significant (p > 0.05).
†
Unknown in mothers of 61 of 844 foetuses alive at mother's admission (7.2%).
‡
Pregnancy complication includes any of following: preterm prelabour rupture of membranes, abnormal antenatal cardiotocogram, suspected intrauterine growth retardation, iatrogenic preterm birth indicated by maternal disease, pre-eclampsia, eclampsia, essential hypertension, chorioamnionitis, placenta praevia, placental abruption, polyhydramnion, oligohydramnion, diabetes mellitus or gestational diabetes.