1.2. Development
Within the framework of the follow up program, the Dutch translation of the Bayley Developmental Scales (BOS 2–30) had been administered until the age of 2 years. This standardized instrument assesses both mental and motor development of 2 to 30-month-old children [14]. From December 2003 onwards, a new version of the BOS 2–30 was used: the Bailey Scales of Infant Development-Second Edition-Dutch version (BSID-II-NL) [15]. The BOS 2–30 and the BSID-II-NL share the same background and are substantially related to each other [16]. Both tests provide a mental developmental index (MDI) and a psychomotor developmental index (PDI) with a mean (SD) of the normative population of 100 (15). We clustered the results into normal (N − 1 SD), mild developmental delay (− 2 to − 1 SD), and severe developmental delay (b−2 SD). We identified the children with a developmental delay (mild or severe) at any contact moment, and lack of a score in the normal range at a later contact moment, and clustered them as such.
At 5 years of age, both the short version of the Revised Amsterdam Intelligence Test (RAKIT) and the Movement Assessment Battery for Children (MABC) were adminis- tered, as described previously [17]. For the RAKIT [18], the mean (SD) score of the normative population is 100 (15). The MABC [19] presents a total impairment score (TIS) and three subtest scores: manual dexterity, ball skills, and balance skills. The MABC test results are expressed in percentiles, which we clustered into normal (Np15), borderline (p6-p15), and definite motor problem (≤p5). The maximal exercise capacity was tested with the Bruce treadmill protocol at 5 years of age. This yielded a maximal endurance time which was converted to SDS using recently published Dutch reference values
1.2. DevelopmentWithin the framework of the follow up program, the Dutch translation of the Bayley Developmental Scales (BOS 2–30) had been administered until the age of 2 years. This standardized instrument assesses both mental and motor development of 2 to 30-month-old children [14]. From December 2003 onwards, a new version of the BOS 2–30 was used: the Bailey Scales of Infant Development-Second Edition-Dutch version (BSID-II-NL) [15]. The BOS 2–30 and the BSID-II-NL share the same background and are substantially related to each other [16]. Both tests provide a mental developmental index (MDI) and a psychomotor developmental index (PDI) with a mean (SD) of the normative population of 100 (15). We clustered the results into normal (N − 1 SD), mild developmental delay (− 2 to − 1 SD), and severe developmental delay (b−2 SD). We identified the children with a developmental delay (mild or severe) at any contact moment, and lack of a score in the normal range at a later contact moment, and clustered them as such.At 5 years of age, both the short version of the Revised Amsterdam Intelligence Test (RAKIT) and the Movement Assessment Battery for Children (MABC) were adminis- tered, as described previously [17]. For the RAKIT [18], the mean (SD) score of the normative population is 100 (15). The MABC [19] presents a total impairment score (TIS) and three subtest scores: manual dexterity, ball skills, and balance skills. The MABC test results are expressed in percentiles, which we clustered into normal (Np15), borderline (p6-p15), and definite motor problem (≤p5). The maximal exercise capacity was tested with the Bruce treadmill protocol at 5 years of age. This yielded a maximal endurance time which was converted to SDS using recently published Dutch reference values
การแปล กรุณารอสักครู่..
