Griffiths scale score band equivalents for ICD10 ranges of mental retardation
| ICD10 levels of mental retardation (standardised score range) | ||||
|---|---|---|---|---|
| Griffiths scale | Profound (<20) | Severe (20–34) | Moderate (35–49) | Mild (50–69) |
| Total scale (GQ) | <32 | 32–44 | 45–57 | 57–74 |
| Locomotor development | <13 | 13–29 | 30–45 | 46–67 |
| Personal–social development | <14 | 14–29 | 30–45 | 46–67 |
| Hearing and speech | <5 | 5–22 | 23–39 | 40–63 |
| Hand and eye coordination | <17 | 17–32 | 33–47 | 48–68 |
| Performance tests | <8 | 8–24 | 25–41 | 42–64 |
| Practical reasoning | <7 | 7–23 | 24–41 | 41–64 |