Table 2 Primary and secondary outcomes t-test between BDNF genotype groups (n = 42).

From: Functional connectivity response to acute pain assessed by fNIRS is associated with BDNF genotype in fibromyalgia: an exploratory study

BDNF Val/Val genotype (n = 30)

BDNF Val/Met genotype (n = 12)

p-value

Mean (SD)

Mean (SD)

 

Primary outcome—ROI-ROI ΔFC

 

ΔFC l-PFC—l-MC$

 − 0.079185732557955 (0.312291438384725)

0.071756194819515 (0.235193737916397)

0.140

ΔFC l-PFC—r-PFC$

 − 0.090395179866225 (0.286240405013819)

0.070308044593503 (0.237241679754818)

0.093

ΔFC l-PFC—r-MC$

 − 0.095883175866177 (0.299206968556765)

0.042919540038922 (0.207586756768148)

0.150

ΔFC l-MC—r-PFC$

 − 0.099790748977071 (0.306940454691258)

0.046170791613494 (0.294900024441640)

0.167

ΔFC l-MC—r-MC$

 − 0.083263924666726 (0.323896895126145)

0.042149028486911 (0.325663749592960)

0.264

ΔFC r-PFC—r-MC$

 − 0.080938736528707 (0.328997349351637)

 − 0.006936448860856 (0.303214680167078)

0.505

Secondary outcomes

Mean (SD) and median and interquartile interval (Q-25–75)

Mean (SD) and median and interquartile interval (Q-25–75)

Change on Numerical Pain Scale (0–10) during conditioned pain modulation ¥

 − 0.87 (2.03) − 1 (− 5; 4)

 − 2 (1.90) − 1(1.90; 1)

0.10

Fibromyalgia Impact Questionnaire¥

73.27 (13.53) 74.86 (22.67; 94.65)

60.54 (18.31) 63.59 (17.68; 92.59)

0.00

  1. Data are presented as the mean (standard deviation) and/or median interquartile.
  2. BDNF brain-derived neurotrophic factor. Val/Val Val66Val homozygous. Val/Met Val66Met heterozygous. ROI region of interest. ΔFC difference in functional connectivity. l- left; r- right. PFC prefrontal cortex. MC motor cortex. SD standard deviation.
  3. $Compared by t-test for independent samples. ¥Mann–Whitney Test.