Table 2—

Difference in fasting glucose, proinsulin, and insulin concentrations and insulin resistance and β-cell function for every 100-g within-pair difference in birth weight in MZ and DZ twins, and in all twins combined

MZ (n = 239)
DZ (n = 138)
All (n = 377)
Slope95% CIPSlope95% CIPSlope95% CIP
Fasting glucose (mol/l)0.01(−0.004 to 0.02)0.17−0.01(−0.03 to 0.01)0.200.00(−0.01 to 0.01)0.93
Fasting proinsulin (pmol/l)−0.02(−0.14 to 0.10)0.77−0.004(−0.23 to 0.22)0.97−0.01(−0.13 to 0.10)0.82
Fasting insulin (pmol/l)−0.12(−0.70 to 0.47)0.70−1.03(−2.01 to −0.05)0.04−0.51(−1.0 to 0.02)0.06
Insulin resistance−0.004(−0.03 to 0.02)0.79−0.02(−0.08 to 0.01)0.12−0.02(−0.04 to 0.01)0.16
β-Cell function (%)−2.55(−5.31 to 0.21)0.07−2.75(−6.39 to 0.90)0.14−2.63(−4.8 to −0.44)0.02
  • Data were adjusted for sex and BMI.