Table 4.

Left/right hippocampus and grouped hippocampal subfield volumetric differences.

		High-risk preterm n = 16 Mean ± SD	Low-risk preterm n = 20 Mean ± SD	Full-term n = 22 Mean ± SD	F-Snedecor Statistic (p)		${\eta }_p^2$
Hippocampus (mm3) (covariate according to eTIV, age and presence of shunt valve)
Left Hippocampus		2,971.73 ± 579.95	3,459.27 ± 390.23	3,399.56 ± 271.96	13.00 (< .001)*		.56
Right Hippocampus		2,974.33 ± 424.70	3,352.35 ± 382.10	3,402.27 ± 288.50	26.53 (< .001)*		.72
Grouped hippocampal subfields (mm3) (covariate according to eTIV, age and presence of shunt valve)
Left Subiculum		253.85 ± 62.63	301.99 ± 25.09	325.08 ± 31.07	10.73 (< .001)*		.51
Right Subiculum		241.49 ± 42.45	280.87 ± 29.85	299.92 ± 30.72	14.82 (< .001)*		.59
Left CA-field		1582.24 ± 322.00	1853.45 ± 231.12	1803.92 ± 156.22	12.74 (< .001)*		.55
Right CA-field		1606.23 ± 231.57	1812.39 ± 229.66	1841.89 ± 169.12	21.49 (< .001)*		.67
Left Dentate Gyrus		498.84 ± 86.81	567.66 ± 86.26	547.14 ± 53.92	13.38 (< .001)**		.56
Right Dentate Gyrus		509.74 ± 77.95	545.44 ± 77.38	545.16 ± 69.63	15.27 (< .001)*		.60

SD: standard deviation; mm³: cubic millimeter; and ${\eta }_p^2$: partial eta squared.

*Statistically significant differences between High-risk preterm < Full-term and High-risk preterm < Low-risk preterm.

**Statistically significant differences between High-risk preterm < Low-risk preterm. The global bilateral hippocampal volumes and grouped hippocampal subfield volumes shown in bold are those that remained significant after Bonferroni correction was applied for multiple comparisons (p = .006).