The Effects of Lutein and Zeaxanthin Supplementation on Brain Morphology in Older Adults: A Randomized, Controlled Trial

Table 4

Treatment response–change in MPOD concentrations.

	M (SD)
	Preintervention	Postintervention
Supplement group
Responder (N = 15)	0.4547 (0.1992)	0.6947 (0.2329)
Nonresponder (N = 18)	0.5717 (0.1658)	0.5111 (0.1705)
Placebo group	0.4414 (0.0373)	0.4843 (0.0536)
Responder (N = 7)	0.3871 (0.1602)	0.5943 (0.1605)
Nonresponder (N = 7)	0.4957 (0.9888)	0.3743 (0.1820)
Total sample	0.4955 (0.0259)	0.5617 (0.0317)
Responder (N = 22)	0.4332 (0.1866)	0.6627 (0.2141)
Nonresponder (N = 25)	0.5504 (0.1521)	0.4728 (0.1811)

Note: indicates a significant change from pre- to postintervention of .