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Retrospective Cohort Study
©The Author(s) 2025.
World J Psychiatry. Dec 19, 2025; 15(12): 109680
Published online Dec 19, 2025. doi: 10.5498/wjp.v15.i12.109680
Table 2 Major outcomes for the whole coronavirus disease 2019 cohort, and for the non-coronavirus disease 2019 control cohort, n (%)

Total (n = 8874)
Patients exposed to COVID-19 (n = 4437)
Patients never exposed to COVID-19 (n = 4437)
P value1
Neurological disorders
Cognitive deficit< 0.0001
    Yes483 (5.44)350 (7.89)133 (3.00)
    No8391 (94.55)4087 (92.11)4304 (97.00)
Myoneural junction0.03
    Yes216 (2.43)92 (2.07)124 (2.79)
    No8658 (97.56)4345 (97.93)4313 (97.21)
Ischaemic stroke0.002
    Yes344 (3.87)200 (4.51)144 (3.25)
    No8530 (96.12)4237 (95.49)4293 (96.75)
Nerve plexus disorder< 0.0001
    Yes1964 (22.13)1075 (24.23)889 (20.04)
    No6910 (77.86)3362 (75.77)3548 (24.23)
Insomnia
    Yes884 (9.96)574 (12.94)310 (6.99)< 0.0001
    No7990 (90.03)3863 (87.06)4127 (93.01)
Parkinsonism0.08
    Yes196 (2.21)110 (2.48)86 (1.94)
    No8678 (97.79)4327 (97.52)4351 (98.06)
Substance use disorder0.06
    Yes58 (0.65)36 (0.81)22 (0.50)
    No8816 (99.34)4401 (99.19)4415 (99.50)
Intracranial hemorrhage0.23
    Yes213 (2.4)98 (2.21)115 (2.59)
    No8661 (97.6)4339 (97.79)4322 (97.41)
Guillain-Barré syndrome0.63
    Yes39 (0.44)18 (0.41)21 (0.47)
    No8835 (99.56)4419 (99.59)4416 (99.53)
Epilepsy< 0.0001
    Yes2723 (30.68)1080 (24.34)1643 (37.03)
    No6151 (96.31)3357 (75.66)2794 (62.97)
Encephalopathy0.52
    Yes86 (0.96)46 (1.04)40 (0.90)
    No8788 (99.03)4397 (98.96)4391 (99.10)
Dementia< 0.0001
    Yes481 (5.42)367 (8.27)114 (2.57)
    No8394 (94.57)4070 (91.73)4323 (97.43)
Psychiatric disorders
Mood disorder< 0.0001
    Yes2123 (23.92)1149 (25.90)974 (21.95)
    No6751 (76.07)3288 (74.10)3463 (78.05)
Psychotic disorder0.05
    Yes382 (4.3)172 (3.88)210 (4.73)
    No8492 (95.69)4265 (96.12)4227 (95.27)
Anxiety disorder
    Yes259 (2.92)139 (3.13)120 (2.70)
    No8615 (97.08)4298 (96.87)4317 (97.30)


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