. Author manuscript; available in PMC: 2021 Jul 1.

Published in final edited form as: Stat Methods Med Res. 2019 Sep 23;29(7):1769–1786. doi: 10.1177/0962280219876963

Table 3:

Estimates (standard errors) of the coefficients of the allometric model for BW and HC, along with the p-values of the tests on equality of the slopes. The 90th percentile of the allometric ratio is reported in the last column.

	log₁₀ a	Parameter b	Q_R(0.9)
All	0.4488 (0.0011)	0.3166 (0.0004)	2.9647 (0.0006)
Sex (p-value 0.841)
Females	0.4488 (0.0017)	0.3166 (0.0006)	2.9641 (0.0008)
Males	0.4497 (0.0016)	0.3164 (0.0005)	2.9704 (0.0009)
Gestational age (p-value < 0.001)
(21,23]	0.1816 (0.0087)	0.4125 (0.0032)	1.6123 (0.0018)
(23,25]	0.4212 (0.0034)	0.3260 (0.0012)	2.7798 (0.0013)
(25,27]	0.5102 (0.0027)	0.2963 (0.0009)	3.4026 (0.0011)
(27,29]	0.5413 (0.0024)	0.2865 (0.0008)	3.6553 (0.0010)