Author response table 1. Twin Sensitivity Analysis: Association Between Telomere Length at Year 1 and Growth.

Exposure	Outcome	N	10th Percentile	90th Percentile	Outcome, 90th Percentile v. 10th Percentile
					Adjusted
					Predicted Outcome at 10th Percentile	Predicted Outcome at 90th Percentile	Coefficient (95% CI)	P-value
Telomere length at Year 1	LAZ Year 1	635	1.2	1.7	-1.52	-1.32	0.2 (0.02, 0.37)	0.03*
	WAZ Year 1	634	1.2	1.7	-1.18	-1.20	-0.02 (-0.22, 0.19)	0.89
	WLZ Year 1	633	1.2	1.7	-0.66	-0.83	-0.17 (-0.37, 0.03)	0.10
	HCZ Year 1	635	1.2	1.7	-1.72	-1.73	-0.01 (-0.2, 0.18)	0.92
	LAZ Year 2	540	1.2	1.7	-1.50	-1.44	0.06 (-0.04, 0.16)	0.21
	WAZ Year 2	540	1.2	1.7	-1.74	-1.69	0.05 (-0.05, 0.16)	0.35
	WLZ Year 2	566	1.2	1.7	-0.97	-1.00	-0.03 (-0.15, 0.08)	0.58
	HCZ Year 2	563	1.2	1.7	-1.87	-1.82	0.04 (-0.13, 0.21)	0.65
	Change in LAZ between Year 1 and Year 2	566	1.2	1.7	-0.24	-0.29	-0.05 (-0.14, 0.05)	0.35
	Change in WAZ between Year 1 and Year 2	570	1.2	1.7	-0.37	-0.38	-0.01 (-0.11, 0.09)	0.87
	Change in WLZ between Year 1 and Year 2	563	1.2	1.7	-0.25	-0.22	0.03 (-0.1, 0.17)	0.66
	Change in HCZ between Year 1 and Year 2	543	1.2	1.7	-0.16	-0.11	0.06 (-0.05, 0.17)	0.32
	Length velocity between Year 1 and Year 2	539	1.2	1.7	0.80	0.80	0 (-0.02, 0.03)	0.76
	Weight velocity between Year 1 and Year 2	539	1.2	1.7	0.15	0.15	0 (-0.01, 0.01)	0.84
	Head circumference velocity between Year 1 and Year 2	543	1.2	1.7	0.15	0.16	0.01 (0, 0.02)	0.14

N, 10th Percentile, and 90th Percentile are from the adjusted analyses.

P-value < 0.05 after adjusting for multiple comparisons using the Benjamini-Hochberg procedure.