Table 3:

Association between the rate of change in maternal anthropometry and neonatal anthropometry^†

	Neonatal Anthropometry
Maternal Anthropometry	Lean Mass (g) β (95% CI)	Fat Mass (g) β (95% CI)	Fat Percent (%) β (95% CI)	Birthweight (g) β (95% CI)
Mid-upper arm circumference (per 1mm change/week)
Second Trimester (15-<28wks)	−25.8 (−54.0, 2.35)	9.64 (−7.71, 26.4)	0.33 (−0.06, 0.73)	−13.61 (−53.4, 26.2)
Third Trimester (28–40wks)	−28.1 (−60.2, −4.13)*	15.07 (−4.06, 34.2)	0.48 (0.03, 0.93)*	−13.7 (−59.4, 31.9)
Subscapular Skinfold (per 0.1 mm change/week)
Second Trimester (15-<28wks	−36.3 (−79.0, 6.33)	−10.75 (−36.3, 14.76)	−0.21 (−0.80, 0.39)	−39.1 (−99.3, 21.2)
Third Trimester (28–40wks)	−22.4 (−46.9, 2.24)	−6.29 (−21.0, 8.49)	−0.12 (−0.46, 0.23)	−24.5 (−59.3, 10.3)
Triceps skinfold (per 0.1mm change/week)
Second Trimester (15-<28wks)	−15.9 (−27.1, −4.74)*	−0.51 (−7.18, 6.16)	−0.041 (−0.12, 0.19)	−13.7 (−29.5, 2.10)
Third Trimester (28–40wks)	−13.1 (−22,7, −3.37)*	−2.65 (−8.45, 3.14)	−0.028 (−0.16, 0.11)	−13.3 (−27.1, 0.35)
Maternal Weight Change (per 0.1kg change/week)
Second Trimester (15-<28wks)	31.8 (23.2, 40.5)*	21.3 (16.2, 26.5)*	0.44 (0.32, 0.56)*	54.5 (42.3, 66.6)*
Third Trimester (28–40wks)	12.9 (7.60, 18.4)*	9.42 (6.22, 12.6)*	0.19 (0.12, 0.26)*	22.7 (15.2, 30.3)*
Net Weight Changet‡ (per 0.1kg change/week)
Second Trimester (15-<28wks)	24.6 (18.1, 31.2)*	16.7 (12.8, 20.6)*	0.34 (0.25, 0.44)*	42.4 (33.3, 51.6)*
Third Trimester (28–40wks)	7.43 (2.85, 12.01)*	6.06 (3.33, 8.79)*	0.12 (0.06, 0.18)*	13.8 (7.37, 20.3)*

^*P<0.05

^†Values are beta coefficients (95% CI); adjusted for race, infant sex, parity, age, height, pre-pregnancy BMI, gestational age at delivery, neonatal measurement date, and baseline anthropometry value; Neonatal lean mass, fat mass, and fat percent (n=1698), Birthweight (n=1759)

^‡Calculated as the difference between maternal weight and estimated fetal weight’