Table 4

Difference in systolic pressure (mm Hg) per kg increase in birth weight adjusted for BMI. Results for the overall twin sample and for within twin pair (intrapair) comparisons

	Age		Monozygotic twins				Dizygotic twins			All
	Age		Overall sample (SE) Number	Intrapair comparison (SE) Number			Overall sample (SE) Number	Intrapair comparison (SE) Number		Overall sample (SE) Number	Intrapair comparison (SE) Number
Male	11–13	−0.16 (1.05) 498	1.65 (2.55) 249		−1.08 (1.38) 234	0.82(2.84)117		−0.46 (0.84) 732	1.37 (1.85) 366
	17–18	−1.19 (1.39) 368	−1.16 (1.80) 184		−2.15 (2.01) 192	0.54(2.89) 96		−1.38 (1.17) 560	−0.42 (1.54) 280
		−0.70 (0.89) 866	0.40 (1.60) 433		−0.25 (1.26) 426	0.68(2.01)213		−0.57 (0.73) 1292	0.57 (1.23) 646
Female	11–13	−3.48 (1.58) 436	−2.25 (2.55) 218		−1.76 (2.13) 266	−0.79(2.30)133		−3.12 (1.25) 702	−1.59 (1.66) 351
	17–18	−3.19 (1.50) 420	−0.33 (1.90) 210		2.16 (2.04) 206	0.77(3.09)103		−1.31 (1.21) 626	0.07 (1.63) 313
		−3.19 (1.09) 856	−1.56 (1.53) 428		−0.57 (1.46) 472	−0.20(1.84)236		−2.32 (0.87) 1328	−0.87 (1.17) 664
All	11–13	−1.30 (0.98) 934	−0.02 (1.81) 467		−1.91 (1.31) 500	−0.05(1.80)250		−1.60 (0.78) 1434	−0.05 (1.25) 717
	17–18	−2.42 (1.24) 788	−0.74 (1.32) 394		4.05 (1.87) 398	0.59(2.08)199		−0.39 (1.04) 1186	−0.16 (1.12) 593
		−1.69 (0.78) 1722	−0.56 (1.11) 861		0.53 (1.11) 898	0.19(1.36)449		−1.00 (0.64) 2620	−0.15 (0.85) 1310^4-150

↵4-150 Missing values for height in one twin pair.