Table 2.
The PDMS-2a standard scores for the subtests, gross motor, fine motor, and total motor.
| PDMS-2 category | Standard scores, mean (SD) | |||
|
|
6 months (n=246) | 12 months (n=225) | 18 months (n=192) | 24 months (n=170) |
| Reflexes | 10.56 (1.02) | —b | — | — |
| Stationary | 9.67 (1.44) | 9.48 (1.00) | 9.94 (0.36) | 9.03 (1.38) |
| Locomotor | 10.09 (1.08) | 8.82 (1.76) | 9.26 (1.24) | 8.61 (1.70) |
| Object manipulation | — | 9.92 (0.78) | 9.49 (1.16) | 8.74 (1.33) |
| Grasping | 10.69 (1.02) | 11.08 (1.44) | 9.55 (0.78) | 9.99 (0.98) |
| Visual-motor integration | 11.19 (1.20) | 10.69 (1.13) | 11.04 (1.74) | 9.79 (1.74) |
| Gross motor | 30.34 (2.72) | 28.25 (2.65) | 28.63 (2.21) | 26.16 (3.17) |
| Fine motor | 21.86 (2.02) | 21.83 (2.17) | 20.67 (1.93) | 19.80 (2.22) |
| Total | 52.24 (4.18) | 50.23 (5.05) | 49.43 (3.19) | 45.98 (4.69) |
aPDMS-2: Peabody Developmental Motor Scales-Second Edition.
bReflexes is only for 6-month infants, and object manipulation is only for 12-, 18-, and 24-month infants.