Table 4 Rates of preterm delivery (PTD) and subtypes among non-immigrants, and immigrants by length of residence
From: Preterm subtypes by immigrants’ length of residence in Norway: a population-based study
PTD | Spontaneous PTDa | Non-spontaneous PTDb | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Births | Cases | By the length of residence (years) | Cases | By the length of residence (years) | Cases | By the length of residence (years) | ||||||||||||||||
0-4 | 5-9 | 10-14 | ≥15 | Pc | 0-4 | 5-9 | 10-14 | ≥15 | Pc | 0-4 | 5-9 | 10-14 | ≥15 | Pc | ||||||||
Population group | n | n | % | % | % | % | % | n | % | % | % | % | % | n | % | % | % | % | % | |||
Non-immigrants | 868 832 | 45 438 | 5.2 | 31 492 | 3.6 | 13 946 | 1.6 | |||||||||||||||
All immigrants | 40 709 | 2753 | 6.8 | 6.4 | 6.4 | 7.3 | 8.8 | <0.001 | 1935 | 4.8 | 4.8 | 4.4 | 4.6 | 5.7 | 0.089 | 818 | 2.0 | 1.6 | 2.0 | 2.7 | 3.1 | <0.001 |
Immigrants by country of birth: | ||||||||||||||||||||||
Iraq | 5879 | 308 | 5.2 | 5.4 | 4.6 | 6.7 | 3.1 | 0.691 | 221 | 3.8 | 4.0 | 3.0 | 4.4 | 2.1 | 0.259 | 87 | 1.5 | 1.4 | 1.6 | 2.3 | 1.0 | 0.296 |
Pakistan | 10 096 | 774 | 7.7 | 7.0 | 7.2 | 7.7 | 9.3 | 0.001 | 493 | 4.9 | 4.9 | 4.5 | 4.5 | 5.6 | 0.256 | 281 | 2.8 | 2.1 | 2.7 | 3.2 | 3.7 | <0.001 |
Phillippines | 5069 | 404 | 8.0 | 6.9 | 8.6 | 9.7 | 11.9 | <0.001 | 297 | 5.9 | 5.3 | 6.4 | 7.2 | 6.6 | 0.066 | 107 | 2.1 | 1.6 | 2.2 | 2.5 | 5.4 | <0.001 |
Somalia | 8094 | 407 | 5.0 | 5.0 | 4.4 | 5.3 | 12.8 | 0.026 | 252 | 3.1 | 3.4 | 2.4 | 2.7 | 7.7 | 0.857 | 155 | 1.9 | 1.6 | 2.0 | 2.7 | 5.1 | <0.001 |
Sri Lanka | 5235 | 386 | 7.4 | 6.1 | 7.9 | 9.6 | 10.5 | <0.001 | 273 | 5.2 | 4.5 | 5.5 | 5.8 | 8.4 | 0.006 | 113 | 2.2 | 1.5 | 2.4 | 3.8 | 2.2 | 0.003 |
Vietnam | 6336 | 474 | 7.5 | 9.3 | 6.8 | 5.7 | 6.8 | 0.001 | 399 | 6.3 | 8.2 | 6.1 | 4.3 | 5.0 | <0.001 | 75 | 1.2 | 1.0 | 0.7 | 1.4 | 1.7 | <0.001 |