Table 1.
Results of the Korean version of the Ages and Stages Questionnaire for infants and children born between 2008 and 2009
| Age (mo) | Preterm | Full term | P value |
|---|---|---|---|
| 9–12 | 0.0001 | ||
| Normal | 21,866 (85.94) | 373,448 (91.38) | |
| Follow-upa) | 2,562 (10.07) | 23,389 (5.79) | |
| Referb) | 1,016 (3.99) | 7,399 (1.83) | |
| 18–24 | 0.0001 | ||
| Normal | 25,944 (87.53) | 436,555 (92.45) | |
| Follow-up | 2,342 (7.90) | 24,974 (5.29) | |
| Refer | 1,353 (4.56) | 10,701 (2.27) | |
| 30–36 | 0.0001 | ||
| Normal | 27,215 (86.69) | 460,596 (91.60) | |
| Follow-up | 2,196 (7.00) | 25,731 (5.12) | |
| Refer | 1,981 (6.31) | 16,531 (3.29) | |
| 42–48 | 0.0001 | ||
| Normal | 26,063 (84.60) | 441,393 (90.02) | |
| Follow-up | 2,114 (6.86) | 26,054 (5.31) | |
| Refer | 2,630 (8.54) | 22,879 (4.67) | |
| 54–60 | 0.0001 | ||
| Normal | 24,182 (81.04) | 416,650 (87.41) | |
| Follow-up | 2,329 (7.80) | 29,763 (6.24) | |
| Refer | 3,329 (11.16) | 30,264 (6.35) | |
| 66–71 | 0.0001 | ||
| Normal | 21,552 (80.03) | 374,671 (85.82) | |
| Follow-up | 2,446 (9.08) | 32,579 (7.46) | |
| Refer | 2,933 (10.89) | 29,349 (6.72) |
Values are presented as number (%).
a)
Follow-up was performed for any child whose score in a particular area was close to the cutoff point.
b)
Referral was made for any child whose score in one or more areas was below the established cutoff point.
Boldface indicates a statistically significant difference with P<0.05.