Table 4.
Internal consistency of clinical scales derived from interRAI Mental Health Instruments, by country.
| Parallel Form Scale | Cronbach’s Alpha | |||||
|---|---|---|---|---|---|---|
| CMH | BMHS Canada (n = 72,734) |
ESP Canada (n = 5,249) |
MH Canada (n = 230,790) |
|||
| Canada (n = 8,667) | Finland (n = 1,506) | New York (n = 2,689) |
||||
| Depressive Severity Index (0–15) | 0.89 | 0.84 | .84 | NA5 | .71 | .75 |
| Positive Symptoms Scale (0–12) | 0.72 | 0.73 | .74 | .73 | .72 | .71 |
| Negative Symptoms Scale (0–12) | 0.90 | 0.84 | .87 | NA | .86 | .85 |
| Mania Scale (0–20) | 0.70 | 0.68 | .70 | NA | .61 | .77 |
| Aggressive Behavior Scale (0–12) | 0.70 | 0.71 | .60 | NA | .70 | .77 |
| Activities of Daily Living–Short Form (0–16) | 0.81 | 0.74 | .83 | NA | NA | .89 |
| Instrumental Activities of Daily Living Summary (0–30) | 0.85 | 0.89 | .79 | NA | NA | .94 |
5NA—Scale not used in instrument.