TABLE 1.
Demographic and clinical characteristics of patients in four health care systems in a study of schizophrenia polygenic risk score (N=106,160)a
| Measure | Site |
|||||||
|---|---|---|---|---|---|---|---|---|
| GHS (N=44,436) | MSSM (N=9,569) | PHS (N=18,461) | VUMC (N=33,694) | |||||
| Mean | SD | Mean | SD | Mean | SD | Mean | SD | |
| Age (years) | 60.2 | 16.9 | 57.2 | 19.8 | 58.5 | 16.4 | 57.9 | 20.0 |
| N | % | N | % | N | % | N | % | |
| Female | 26,094 | 59 | 4,955 | 52 | 9,913 | 54 | 18,089 | 54 |
| Schizophrenia patients | 211 | <1 | 53 | <1 | 148 | <1 | 110 | <1 |
| Psychosis patients | 499 | 1 | 66 | <1 | 385 | 2 | 451 | 1 |
| All ICD-9/10 codes | 20,083,326 | 1,021,072 | 5,972,131 | 8,043,419 | ||||
| Unique ICD-9/10 codes | 29,766 | 16,535 | 26,441 | 26,283 | ||||
| Median | Median | Median | Median | |||||
| ICD-9/10 codes per patient | 317 | 44 | 184 | 150 | ||||
| Visits per patient | 142 | 81 | 70 | 52 | ||||
| Electronic health record length (days) | 5,509 | 2,942 | 4,729 | 3,884 | ||||
a
Schizophrenia case subjects had two or more ICD codes included in phecode 295.1; for psychosis case subjects, phecode 295. Age is defined as the patients’ age at their most recent hospital visit in which they received an ICD-9/10 code. A visit is both patient- and date-specific but may include many individual ICD-9/10 codes. GHS=Geisinger Health System; MSSM=Mount Sinai School of Medicine; PHS=Partners HealthCare System; VUMC=Vanderbilt University Medical Center.