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. Author manuscript; available in PMC: 2018 Apr 1.
Published in final edited form as: NMR Biomed. 2016 Feb 8;30(4):10.1002/nbm.3489. doi: 10.1002/nbm.3489

Table 2.

Contrast between the GPi and GPe segments among the groups

QSM values (ppm)
Group GPe GPi Differences in GPe and GPi
(95% confidence interval)		 p values
Controls 0.110 ± 0.024 0.099 ± 0.027 0.010 (−0.006 ~ 0.014) < 0.001
EPD 0.108 ± 0.019 0.099 ± 0.026 0.009 (−0.004 ~ 0.014) < 0.001
LPD 0.131 ± 0.032 0.132 ± 0.052 −0.001 (−0.016 ~ 0.014) 0.881

Abbreviations: EPD = early-stage Parkinson’s disease; LPD = late-stage Parkinson’s disease; GPe = globus pallidus external; GPi = globus pallidus internal.