Research Article
A Case-Control Study and Meta-Analysis Reveal BDNF Val66Met Is a Possible Risk Factor for PTSD
Table 7
Results from the subgroup analyses with and without Zhang et al. (2014) [
27] and Dretsch et al. (2016) [
29] from the random-effects model.
| Analysis | Model | Odds ratio | 95% CI | | Fail Safe |
| Ethnicity | | | | | | Caucasian | Val/Val versus Val/Met | 1.14 | 0.84; 1.55 | N/A | 0.71 | Val/Val versus Met/Met | 1.72 | 0.00; | 98.46 | 3.60 | Recessive | 0.92 | 0.84; | N/A | N/A | Dominant | 0.73 | 0.26; 2.09 | 48.90 | N/A | Allele | 0.96 | 0.73; 1.27 | 35.96 | N/A | Asian | Val/Val versus Val/Met | 0.80 | 0.57; 1.11 | N/A | N/A | Val/Val versus Met/Met | 0.67 | 0.20; 2.19 | 83.90 | N/A | Recessive | 0.79 | 0.54; 1.16 | 21.58 | N/A | Dominant | 1.34 | 0.53; 3.39 | 80.38 | 1.71 | Allele | 1.20 | 0.70; 2.08 | 82.22 | 1.04 |
| PTSD− | Val/Val versus Val/Met | 0.86 | 0.40; 1.84 | 89.50 | N/A | Val/Val versus Met/Met | 0.61 | 0.09; 4.00 | 95.33 | N/A | Recessive | 0.70 | 0.30; 1.68 | 93.48 | N/A | Dominant | 0.96 | 0.009; 10.65 | 97.09 | N/A | Allele | 1.44 | 0.55; 3.78 | 96.91 | 2.64 | PTSD− Zhang et al. (2014) [27] removed | Val/Val versus Val/Met | 0.95 | 0.54; 1.68 | 69.17 | N/A | Val/Val versus Met/Met | 0.66 | 0.18; 2.55 | 88.64 | N/A | Recessive | 0.85 | 0.65; 1.10 | 22.69 | N/A | Dominant | 0.71 | 0.04; 11.63 | 97.19 | N/A | Allele | 1.24 | 0.83; 1.83 | 76.44 | 1.41 | PTSD− Zhang et al. (2014) [27] and Dretsch et al. (2016) [29] removed | Val/Val versus Val/Met | 0.84 | 0.66; | 6.22 | N/A | Val/Val versus Met/Met | 0.85 | 0.26; 2.80 | 84.52 | N/A | Recessive | 0.82 | 0.60; 1.15 | 42.00 | N/A | Dominant | 0.57 | 0.03; 11.16 | 97.59 | N/A | Allele | 1.21 | 0.77; 1.91 | 80.97 | 1.06 |
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Note. Approaching significance; very wide confidence intervals potentially due to frequencies.
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