Authors Year of
publication 		Location Study
period 		Weight/height
measurement 		BMI
classification 		Adjusted for Outcomes
reported
Blomberg and Kallen [33] 2010 Sweden Jan 1995
to
Dec 2007 		First antenatal
clinic by mid wife		 UW < 18.5
NW 18.5 to 24.9
OW 25 to 29.9
Obese ≥ 30 		Maternal age,
parity, smoking,
year of birth		 Orofacial
cleftd
Cedegren and Kallen [44] 2005 Sweden Jan 1992
to
Dec 2001 		First antenatal visit UW < 19.8
NWa 19.8 to 26
OWb 26.1 to 29
Obesec > 29 		Year of birth,
maternal age, parity,
maternal smoking		 CL
CP
CLP

aExcluded because NW is not according to WHO classification.
bExcluded because OW is not according to WHO classification.
cExcluded because obese is not according to WHO classification.
dExcluded because orofacial cleft was not sub-divided.
NW = normal weight (reference weight); OW = overweight; UW = underweight; CL = cleft lip; CP = cleft palate; CLP = cleft lip with or without palate; orofacial cleft = CP+CLP.