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National Women's Annual Clinical Report 2010

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APPENDIX 4. ANTENATAL COMPLICATIONS<br />

4.1 Preterm birth<br />

Table 153: Preterm birth and maternal demographic characteristics (<strong>2010</strong>)<br />

Total<br />

Total preterm<br />

birth<br />

Iatrogenic<br />

preterm<br />

Spontaneous<br />

preterm<br />

N n % n % n %<br />

Total<br />

Age<br />

7709 689 8.9 377 4.9 312 4.0<br />

40<br />

Ethnicity<br />

273 34 12.5 23 8.4 11 4.0<br />

NZ European 2898 246 8.5 149 5.1 97 3.3<br />

Maori 579 80 13.8 36 6.2 44 7.6<br />

Pacific 1088 106 9.7 68 6.3 38 3.5<br />

Other Asian 1476 95 6.4 36 2.4 59 4.0<br />

Indian 539 54 10.0 32 5.9 22 4.1<br />

Other European 856 86 10.0 44 5.1 42 4.9<br />

Other<br />

Parity<br />

273 22 8.1 12 4.4 10 3.7<br />

Nulliparous 3650 343 9.4 174 4.8 169 4.6<br />

Multiparous<br />

Plurality<br />

4059 346 8.5 203 5.0 143 3.5<br />

Singleton 7556 589 7.8 303 4.0 286 3.8<br />

Twins 149 96 64.4 71 47.7 25 16.8<br />

Triplets<br />

Smoking at booking<br />

4 4 100.0 3 75.0 1 25.0<br />

Currently smoking 601 86 14.3 45 7.5 41 6.8<br />

No or not in last month 7061 583 8.3 326 4.6 257 3.6<br />

Unknown<br />

BMI<br />

47 20 42.6 6 12.8 14 29.8<br />

35 541 59 10.9 42 7.8 17 3.1<br />

Missing<br />

Deprivation quintile (NZ Dep 06)<br />

219 66 30.1 35 16.0 31 14.2<br />

1 1352 106 7.8 61 4.5 45 3.3<br />

2 1423 113 7.9 60 4.2 53 3.7<br />

3 1635 145 8.9 82 5.0 63 3.9<br />

4 1776 188 10.6 104 5.9 84 4.7<br />

5 1522 137 9.0 71 4.7 66 4.3<br />

217

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