Analysis of Differences in Preterm Birth Rates According to Household Occupation in Japan From 2007 to 2019
Journal of Preventive Medicine and Public Health. 2022;55(4):371-378 
Preterm birth rates in Japan from 1979 to 2014: Analysis of national vital statistics
Journal of Obstetrics and Gynaecology Research. 2017;44(3):390-396
Preterm births in Iceland 1997‐2016: Preterm birth rates by gestational age groups and type of preterm birth
Birth. 2019;47(1):105-114
International comparisons of preterm birth: higher rates of late preterm birth are associated with lower rates of stillbirth and neonatal death
BJOG: An International Journal of Obstetrics & Gynaecology. 2012;119(13):1630-1639
Are reported preterm birth rates reliable? An analysis of interhospital differences in the calculation of the weeks of gestation at delivery and preterm birth rate
BJOG: An International Journal of Obstetrics and Gynaecology. 2004;111(2):160-163
Socioeconomic inequalities in very preterm birth rates
Child: Care, Health and Development. 2007;33(2):213-214
Smoking during pregnancy and preterm birth according to obstetric history: French national perinatal surveys
Paediatric and Perinatal Epidemiology. 2005;19(2):88-96
Increasing rates of prematurity and epidemiology of late preterm birth
Journal of Paediatrics and Child Health. 2012;48(9):784-788
Analysis of multiple birth rates in Japan VI. Quadruplets: Birth and stillbirth rates
Japanese journal of human genetics. 1982;27(3):227-234
Periodontal treatment in pregnant women improves periodontal disease but does not alter rates of preterm birth
Evidence-Based Dentistry. 2007;8(2):38-38