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Table 3 The distribution of births in different data sets

From: Births and induced abortions among women of Russian, Somali and Kurdish origin, and the general population in Finland –comparison of self-reported and register data

  General population Russian Somali Kurdish
18–29 years a n = 182 n = 83 n = 70 n = 66
Survey data 1, women with at least one birth, % 8.5 (5.1–13.8) 17.0 (11.0–25.3)* 60.3 (48.1–71.3)*** 41.2 (33.1–49.8)***
Register data 2, women with at least one birth, % 8.5 (5.1–13.8) 16.1 (10.3–24.4)* 54.5 (42.8–65.7)*** 37.6 (30.0–46.0)***
Combined data 3, women with at least one birth, % 8.5 (5.1–13.8) 17.0 (11.0–25.3)* 60.3 (48.1–71.3)*** 41.2 (33.1–49.8)***
30–64 years b n = 448 n = 258 n = 104 n = 161
Survey data 1, women with at least one birth, % 69.2 (63.9–74.0) 89.0 (84.0–92.5)*** 95.5 (89.9–98.1)*** 95.7 (91.7–97.9)***
Register data 2, women with at least one birth, % 52.9 (47.6–58.1) 44.7 (38.4–51.1)* 67.5 (58.2–75.6)** 62.3 (55.3–68.8)*
Combined data 3, women with at least one birth, % 69.2 (63.9–74.1) 89.0 (84.0–92.5)*** 95.5 (89.9–98.1)*** 96.4 (92.6–98.3)***
18–64 years c, Combined data 3 n = 630 n = 341 n = 174 n = 227
Among all women
 no births, % 50.6 (46.9–54.2) 33.5 (29.0–38.3)***5 17.6 (13.1–23.3)***5 21.8 (17.8–26.5) ***5
 1–2 births, % 36.8 (33.2–40.5) 58.6 (53.5–63.5) 18.5 (13.3–25.0) 36.4 (30.8–42.4)
 ≥3 births, % 12.6 (10.3–15.4) 7.9 (5.6–11.2) 63.9 (57.4–70.0) 41.8 (36.7–47.0)
Mean number of births among all women 1.0 (1.0–1.1) 1.0 (0.9–1.1) 4.5 (4.0–5.0)*** 2.6 (2.3–2.8)***
Mean number of births among parous women 1.8 (1.7–2.0) 1.6 (1.4–1.7)** 5.9 (5.3–6.4)*** 3.4 (3.1–3.7)***
Among women with first birth before migration   n = 179 n = 57 n = 117
 1–2 births, % NA 86.2 (80.2–90.6) 8.7 (3.7–19.3) 32.0 (24.5–40.5)
 ≥3 births, % NA 13.8 (9.4–19.8) 91.3 (80.7–96.3) 68.0 (59.5–75.5)
 mean NA 1.6 (1.4–1.7) 7.2 (6.4–8.1) 3.8 (3.5–4.2)
Among women with first birth after migration †   n = 72 n = 50 n = 65
 1–2 births, % NA 92.7 (81.6–97.3) 30.8 (18.3–46.8)*** 72.9 (60.1–82.7)***
 ≥3 births, % NA 7.3 (2.7–18.4) 69.2 (53.2–81.7)*** 27.1 (17.3–39.9)***
 mean NA 1.7 (1.5–2.0) 4.2 (3.6–4.73)*** 2.4 (2.1–2.7)***
Women with at least one birth, model-adjusted d % 61.0 (56.3–65.6) 76.4 (72.0–80.3)*** 85.7 (80.8–89.5)*** 83.9 (80.2–87.1)***
  1. 1Survey data:
  2. Migrant Health and Wellbeing Study and the Health 2011 Survey
  3. Age-adjusted and weighted proportions
  4. a18–29 years age adjusted
  5. b30–64 years age adjusted
  6. 2 Register data:
  7. Medical Birth Register and the Register of Induced Abortions
  8. Age-adjusted and weighted proportions
  9. 3 Combined survey and register data:
  10. Combined data from the surveys, Medical Birth Register and Register of Induced Abortions
  11. Age-adjusted and weighted proportions
  12. c18–64 years age adjusted
  13. † Statistical differences in relation to migrant origin women whose first birth was before migration
  14. NA = no observations
  15. dAdjusted for age, work status, marital status and education
  16. Statistically significant differences compared to the Finnish reference group (Satterthwaite adjusted F-statistic):* p-value < 0.05
  17. **p-value < 0.01
  18. ***p-value < 0.001
  19. 5Overall p-value for the difference of the multinomial distribution between general population and the migrant group