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. 2021 Nov 20;12(11):1834. doi: 10.3390/genes12111834

Table 3.

Frequency of genotypes of DRD4 exon 3 (Ex3) gene polymorphisms in patients diagnosed with PUD MDD, patients diagnosed with PUD, and control subjects.

Group DRD4 Ex3
Genotypes Alleles
s/s
n (%)
s/l
n (%)
l/l
n (%)
s
n (%)
l
n (%)
A: PUD MDD
n = 95
63
(66)
30
(32)
2
(2)
156
(82)
34
(18)
B: PUD
n = 206
127
(62)
71
(34)
8
(4)
325
(79)
87
(21)
C: Control
n = 301
177
(59)
98
(33)
26
(9)
452
(75)
150
(25)
χ2 (p value) A/B: 1.01 (0.605)
A/C: 5.05 (0.079)
B/C: 4.42 (0.110)
A/B: 0.84 (0.359)
A/C: 3.99 (0.046 *)
B/C: 1.970 (0.160)

n, number of subjects; * statistically significant differences.