The worldwide incidence of preterm birth: a systematic review of maternal mortality and morbidity
Stacy Beck, Daniel Wojdyla, Lale Say, Ana Pilar Betran, Mario Merialdi, Jennifer Harris Requejo, Craig Rubens, Ramkumar Menon & Paul FA Van Look
Volume 88, Number 1, January 2010, 31-38
Table 3. Preterm birth rates, number of preterm births by United Nations geographical region/subregion and percentage of births covered by the estimates in a systematic review of the worldwide incidence of preterm birth
||Preterm birth rate
||Percent coverage of estimatesc|
|No. in 1000s||95% CIb||%||95% CIb|
|World total||12 870||12 228–13 511||9.6||9.1–10.1||85.8|
|More developed countries||1 014||982–1 046||7.5||7.3–7.8|
|Less developed countries||7 685||7 109–8 261||8.8||8.1–9.4|
|Least developed countries||4 171||3 891–4 452||12.5||11.7–13.3|
|Africa||4 047||3 783–4 311||11.9||11.1–12.6||72.7|
|Eastern||1 686||1 481–1 891||14.3||12.5–16.0|
|Western||1 125||1 036–1 215||10.1||9.3–10.9|
|Asia||6 907||6 328–7 486||9.1||8.3–9.8||90.9|
|South-central||4 467||3 944–4 991||11.4||10.0–12.7|
|South-eastern||1 271||1 062–1 480||11.1||9.3–13.0|
|LA and the Caribbean||933||858–1 009||8.1||7.5–8.8||79.3|
|Rest of Oceania||16||11–20||6.4||4.6–8.2|
CI, confidence interval; PI, prediction interval.
a Countries categorized according to United Nations classification.
b Whereas PIs were calculated for country estimates based on the model, CIs were derived for the regional/subregional aggregate estimates that utilized data from studies as well as modelled estimates.
c Refers to the proportion of live births for which data were available and model-based estimates were not generated.
d Excluding Mexico, which is included under Latin America.