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Table 3 Result of statistical analysis

From: Prevalence of elevated serum anti-N-methyl-D-aspartate receptor antibody titers in patients presenting exclusively with psychiatric symptoms: a comparative follow-up study

  Positive patients (n = 6) Negative patients (n = 53) P-value Statistical method
Age 41.67 ± 16.21 41.89 ± 13.54 0.9775 Welch’s t test
Sex (M/F) 2/4 21/32 1.0000 Fisher’s direct exact test
Pulse rate (/min) 80.33 ± 17.42 96.66 ± 21.35 0.0971 Welch’s t test
Systolic blood pressure (mmHg) 122.17 ± 19.71 126.42 ± 20.83 0.6483 Welch’s t test
Diastolic blood pressure (mmHg) 78.17 ± 13.53 81.76 ± 14.51 0.5782 Welch’s t test
Body temperature (°C) 36.55 ± 0.65 36.74 ± 0.46 0.5471 Welch’s t test
Japan coma scale (0/1/2/3/10/30/100) 4/2/0/0/0/0/0 19/12/5/3/1/1/1 0.4245 Mann–Whitney U test
Precedent infection 0 8 0.5812 Fisher’s direct exact test
Episode times (1/2/3/4/>5) 4/0/1/0/1 17/19/4/3/9 0.3291 Mann–Whitney U test
Treatment period (0/3 months/1 years/5 years/10 years/>10 years) 4/0/0/0/0/0/2 18/1/1/2/11/8/10 0.4987 Mann–Whitney U test
Anxiety/Depression symptoms 3 36 0.3822 Fisher’s direct exact test
 Irritation 3 23 1.0000
 Anxiety 2 24 0.6814
 Depressive mood 1 6 1.0000
 Depersonalization 0 0 *
 Sleep disorder 2 25 0.6752
 Will drop 1 5 1.0000
 Concentration drop 1 8 1.0000
 Suicidal feeling 1 8 1.0000
Mania symptoms 1 16 0.6597
 Hyperthymia 1 10 1.0000
 Hyperlogia 1 11 1.0000
 Hyperactivity 0 4 1.0000
 Flight of idea 0 2 1.0000
Schizophrenia-like symptoms 5 51 0.1978
 Auditory hallucination 3 31 0.6838
 Visual hallucination 0 3 1.0000
 Delusion 3 40 0.3231
 Obfuscation 2 8 0.5770
 Excitement 3 24 1.0000
 Echolalia 0 0 *
 Echopraxia 0 3 1.0000
 Stereotypic language 0 0 *
 Stereotypic movement 0 0 *
 Catalepsy 0 4 1.0000
 Idle–Autosynnoia 0 4 1.0000
 Flattened feeling 1 3 0.3619
Neurological symptoms 0 1 1.0000
 Convulsion (Complex partial seizure) 0 1 1.0000
 Orolingual dyskinesia 1 2 0.2838
 Systemic dyskinesia 0 1 1.0000
 Eye ball dyskinesia 0 2 1.0000
 Instability of blood pressure 0 1 1.0000
 Sweating and drooling abnormality 0 3 1.0000
 Disorientation 0 0 *
 Amnesia 0 7 0.5739
  1. * statistical examination was not performed