REALM scores achieved by Sleep (n=86) and LF (n=30) group patients
| REALM score ranges | Equivalent reading age | % Sleep group (n=86) | % LF group (n=30) | |
| US school grade | UK age equivalent | |||
| 0–18 | Third grade or below | 8 years or less | 0.0 | 0.0 |
| 19–44* | Fourth/sixth grade | 9–12 years | 1.2 | 3.3 |
| 45–60* | Seventh/Eighth grade | 12–14 years | 15.1 | 6.7 |
| 61–66 | High school | 14–15+ | 83.7 | 90.0 |
↵* A score ≤60 suggests a literacy level that would struggle to cope with patient education materials and prescription labels.
LF group, patients attending the Lung Function Laboratory; REALM, Rapid Estimate of Adult Literacy in Medicine; Sleep group, patients attending the Sleep Centre.