Table 2.
Demographic characteristics per clozapine patients and per treatment periods
| Per Patients | |||
|
All Patients n = 1,916 |
Patients who have treatment periods with identified start-datesa n = 1,391 |
Patients who have treatment periods with undetermined start-datesa n = 790 |
|
| Gender | |||
| Male (%) | 1,257 (65.6%) | 898 (64.6%) | 541 (68.5%) |
| Female (%) | 659 (34.4%) | 493 (35.4%) | 249 (31.5%) |
| Ethnicity | |||
| White (%) | 868 (45.3%) | 591 (42.5%) | 393 (49.7%) |
| Black (%) | 799 (41.7%) | 616 (44.3%) | 306 (38.7%) |
| Asian (%) | 150 (7.8%) | 111 (8.0%) | 55 (7.0%) |
| Other and unknown (%) | 99 (5.2%) | 73 (5.3%) | 36 (4.6%) |
| Age at clozapine treatment | |||
| Age at first period, mean (SD) | - | 38.7 (12.7) | - |
| Age at first known period, mean (SD) | 39.0 (12.1) | - | 39.8 (10.8) |
| Per Clozapine Treatment Period | |||
|
All treatment periods n = 2,787 |
treatment periods with identified start-dates n = 1,902 |
treatment periods with undetermined start-dates n = 885 |
|
| Gender | |||
| Male (%) | 1,821 (65.3%) | 1,213 (63.8%) | 608 (68.7%) |
| Female (%) | 966 (34.6%) | 689 (36.2%) | 277 (31.3%) |
| Ethnicity | |||
| White (%) | 1,209 (43.4%) | 782 (41.1%) | 427 (48.2%) |
| Black (%) | 1,220 (43.8%) | 872 (45.8%) | 348 (28.0%) |
| Asian (%) | 219 (7.9%) | 154 (8.1%) | 65 (7.3%) |
| Other and unknown (%) | 139 (5%) | 94 (4.9%) | 45 (5.1%) |
| Age at clozapine treatment periods | |||
| Age range at start of period | 12–88 | 12–88 | 12–76 |
| Periods starting at ages 0–19 (%)b | 66 (2.4%) | 50 (2.6%) | 16 (1.8%) |
| Periods starting at ages 20–39 (%)b | 1,432 (51.4%) | 1,007 (52.9%) | 425 (48.0%) |
| Periods starting at ages 40–59 (%)b | 1,126 (40.4%) | 722 (38.0%) | 404 (45.6%) |
| Periods starting at age 60 and over (%)b | 163 (5.8%) | 123 (6.5%) | 40 (4.5%) |
| Duration of clozapine treatment periods | |||
| Average duration, years | 4.5 (4.8) | 3.1 (3.7) | - |
| Median duration (Interquartile range), years | 2.2 (7.3) | 1.4 (4.4) | - |
| Shorter than 6 months (%) | - | 557 (29.3%) | - |
| Longer than 2 years (%) | 1,437 (51.6%) | 815 (42.8%) | 622 (70.3%) |
aPatients can have both periods with identified start-date, and (additional) periods with undetermined start-date, therefore can appear in both columns
bThe age stratification was done per treatment period, meaning that the same patient can contribute to more than one category of age, per the age in which the treatment period was started