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. Author manuscript; available in PMC: 2013 Jan 1.
Published in final edited form as: Neurobiol Aging. 2010 Feb 1;33(1):9–20. doi: 10.1016/j.neurobiolaging.2010.01.014

Table 4.

A. Results (value± sd (p-value)) of the linear modeling of the maturation and decline rates used general linear mixed effects model in eq 3.
Tract Average
FA
CC Cingulum CR EC IC FO SLF SS
Maturation.
Average FA
.51±0.01 .66±0.01 .40±.01 .46±.01 .38±.01 .55±.01 .49±.01 .43±.01 .40±.01
βage± sd (p) 7.5±3.0·10−4
(.01)
10.8±5.2·10−4
(.05)
13.6±2.6·10−4
(1E-6)
2.5±4.0·10−4
(.5)
0.3±5.7·10−4
(.9)
4.7±2.9·10−4
(.1)
10.9±3.0·10−4
(.0001)
6.8±4.0·10−4
(.05)
12.4±13.0·10−4
(.2)
βsex± sd (p) −242±85·10−4
(.004)
−370±139·10−4
(.01)
−78±76·10−4
(.2)
−104±122·10−4
(.4)
−40±135·10−4
(.8)
−166±68·10−4
(.02)
−120±80·10−4
(.2)
−155±101·10−4
(.1)
31±249·10−4
(.9)
βage,sex± sd
(p)
14.2±4.7·10−4
(.01)
18.4±6.7·10−4
(.01)
7.1±3.4·10−4
(.05)
6.2±8.8·10−4
(.4)
1.0±1.6·10−4
(.5)
9.1±3.9·10−4
(.02)
4.5±3.7·10−4
(.2)
10.7±6.4·10−4
(.1)
−3.3±18.0·10−4
(.9)
r/F3,N (p) .33/13.0 3,307
(1E-8)
.30/12.3 3,337
(1E-7)
.40/29.03,403
(2E-16)
.01/0.8 3,276
(0.5)
.01/0.4 3,265
(0.7)
.22/6.7 3,265
(.001)
.30/14.0 3,395
(1E-9)
.17/3.5 3,284
(.01)
.1/1.1 3,254
(.3)
Decline.
Average FA
.58±.01 .78±.01 .50±.01 .51±.01 .42±.01 .59±.01 .60±.01 .48±.01 .45±.01
βage± sd (p) −11.7±1.3·10−4
(1E-16)
−21.0±2.6·10−4
(1E-16)
−12.0±1.9·10−4
(1E-9)
−12.0±1.0·10−4
(1E-16)
−9.7±0.9·10−4
(1E-16)
−6.5±1.0·10−4
(1E-9)
−14.5±2·10−4
(1E-9)
−9.4±1.1·10−4
(1E-16)
−6.7±.8·10−4
(1E-16)
βsex± sd (p) 261±102·10−4
(.01)
300±218·10−4
(.2)
422±190·10−4
(.01)
87±78·10−4
(.2)
73±76·10−4
(.4)
68±87·10−4
(.4)
220±221·10−4
(.5)
97±82·10−4
(.2)
80±68·10−4
(.2)
βage,sex± sd
(p)
−5.6±2.0·10−4
(.001)
−8.1±4.0·10−4
(.05)
−6.7±3.0·10−4
(.02)
−3.0±1.3·10−4
(.4)
−1.9±1.5·10−4
(.2)
−1.4±1.6·10−4
(.4)
−4.3±3.8·10−4
(.3)
−1.4±1.6·10−4
(.4)
−2.2±1.3·10−4
(.1)
r/F 3,N (p) .57/76.7 3,408
(<1E-16)
.54/57.8 3,373
(<1E-16)
.49/36.7 3,304
(<1E-16)
.62/104.0 3,459
(<1E-16)
.53/67.1 3,479
(<1E-16)
.39/26.4 3,408
(1E-16)
.41/25.1 3,318
(<1E-14)
.50/54.6 3,450
(<1E-16)
.45/45.2 3,493
(<1E-16)
Table 4B. Results of the linear modeling of the maturation and decline rates for three compartment of the Corpus Callosum (CC) using general linear mixed effects model in eq 3
Tract CC Genu CC Body CC Splenium
Maturation. Average FA (A) .57±0.01 .61±0.01 .76±.02
βage± sd (p) 21.3±5.0·10−4 (.001) 14.7±8.9·10−4 (.1) 8.4±7.1·10−4 (.2)
βsex± sd (p) −165±159·10−4 (.3) −392±225·10−4 (.1) −854±190·10−4 (1E-5)
βage,sex± sd (p) 12.3±8.2·10−4 (.1) 24.0±12.7·10−4 (.06) 47.0±12.5·10−4 (.001)
r/F (p) .30/13.3 3,337 (1E-8) .25/6.9 3,305 (1E-4) .30/10.8 3,286 (1E-6)
Decline. Average FA (A) .73±.02 .72±.02 .82±.02
βage± sd (p) −26.5±3.2·10−4 (1E-16) −17.6±3.3·10−4 (1E-7) −12.1±2.5·10−4 (1E-6)
βsex± sd (p) 358±266·10−4 (.2) 369±259·10−4 (.2) 408±190·10−4 (.03)
βage,sex± sd (p) −8.7±4.8·10−4 (.1) −10.7±4.9·10−4 (.03) −9.1±3.5·10−4 (.01)
r/Fn,N (p) .54/56.1 3,373
(<1E-16)
.41/32.1 3,407
(<1E-16)
.38/29.7 3,437
(<1E-16)