Table 3.
Interrater reliability of AIMS scores between any two raters.
| Group | Raters A and B | Raters A and C | Raters B and C | |||
|---|---|---|---|---|---|---|
| ICC | 95%CI | ICC | 95%CI | ICC | 95%CI | |
| 0–3 months (n = 23) | ||||||
| Prone | 0.982 | 0.957–0.992 | 0.976 | 0.944–0.990 | 0.959 | 0.904–0.983 |
| Supine | 0.979 | 0.951–0.991 | 0.965 | 0.918–0.985 | 0.944 | 0.868–0.976 |
| Sitting | 0.907 | 0.781–0.961 | 0.923 | 0.819–0.967 | 0.940 | 0.858–0.975 |
| Standing | 1.000 | 1.000–1.000 | 0.880 | 0.717–0.949 | 0.880 | 0.717–0.949 |
| Total score | 0.977 | 0.947–0.990 | 0.975 | 0.940–0.989 | 0.967 | 0.921–0.986 |
| 4–9 months (n = 27) | ||||||
| Prone | 0.992 | 0.983–0.996 | 0.984 | 0.964–0.992 | 0.990 | 0.977–0.995 |
| Supine | 0.993 | 0.984–0.997 | 0.982 | 0.960–0.992 | 0.983 | 0.963–0.992 |
| Sitting | 0.990 | 0.979–0.996 | 0.987 | 0.972–0.994 | 0.979 | 0.955–0.991 |
| Standing | 1.000 | 1.000–1.000 | 0.814 | 0.592–0.915 | 0.814 | 0.592–0.915 |
| Total score | 0.999 | 0.997–0.999 | 0.991 | 0.981–0.996 | 0.992 | 0.982–0.996 |
| 0–9 months (n = 50) | ||||||
| Prone | 0.995 | 0.991–0.997 | 0.990 | 0.983–0.994 | 0.992 | 0.985–0.995 |
| Supine | 0.995 | 0.991–0.997 | 0.990 | 0.982–0.994 | 0.988 | 0.978–0.993 |
| Sitting | 0.992 | 0.986–0.995 | 0.989 | 0.981–0.994 | 0.985 | 0.974–0.992 |
| Standing | 1.000 | 1.000–1.000 | 0.867 | 0.766–0.925 | 0.867 | 0.766–0.925 |
| Total score | 0.999 | 0.997–0.999 | 0.994 | 0.989–0.997 | 0.994 | 0.990–0.997 |
95%CI: 95% confidence interval; AIMS: Alberta Infant Motor Scale; ICC: intraclass correlation coefficient; SD: standard deviation.