Table 1.
Characteristics of Cases and Controlsa
| Variable | Cases (n = 8) | Controls (n = 92) | P Value |
| Anthropometrics | |||
| Male, n (%) | 7 (88) | 80 (87) | 1.0000 |
| Age, mean ± SD, y | 49 ± 12 | 47 ± 13 | 1.0000 |
| Height, mean ± SD, cm | 174 ± 8 | 179 ± 15 | .3555 |
| Weight, mean ± SD, kg | 85 ± 15 | 87 ± 19 | .7728 |
| Body mass index, mean ± SD, kg/m2 | 28 ± 6 | 29 ± 6 | .6522 |
| Diagnoses (DSM-IV) | |||
| Schizophrenia, n (%) | 5 (63) | 54 (59) | .6638 |
| Bipolar disorder, n (%) | 2 (25) | 22 (24) | 1.0000 |
| Major depressive disorder, n (%) | 0 (0) | 3 (3) | .2462 |
| Other psychotic disorders, n (%) | 1 (12) | 13 (14) | .1871 |
| Psychiatric drugs | |||
| Antidepressants, n (%) | 2 (26) | 30 (33) | .3523 |
| Antipsychotics (clozapine included), n (%) | 6 (75) | 78 (85) | .1109 |
| Benzodiazepines, n (%) | 3 (38) | 37 (41) | .7725 |
| Lithium, n (%) | 1 (13) | 19 (21) | .1871 |
| Laboratory values | |||
| Immunoglobulin A level, mean ± SD, mg/dL | 202 ± 80 | 214 ± 107 | .7579 |
| Immunoglobulin G level, mean ± SD, mg/dL | 903 ± 195 | 991 ± 240 | .3164 |
| Immunoglobulin M level, mean ± SD, mg/dL | 20 ± 3 | 100 ± 55 | .0001* |
| White blood cell count, mean ± SD, cells/μL | 7,115 ± 2,498 | 7,962 ± 2,772 | .4060 |
| Absolute neutrophil count, mean ± SD, cells/μL | 4,117 ± 1,940 | 4,562 ± 2,007 | .8341 |
a
Student t test for comparing continuous variables; Fisher exact test for comparing categorical variables.
*
Indicates statistical significance.