Teacher rating of the hyperactivity subscale (7 items), one of 3 subscales in the FBB-ADHS. Each item is rated on a scale of 0 = not at all up to 3 = very much. The rating was completed by teachers on Friday afternoon of each week of the study. A total score (sum of all items divided by 7) was calculated. The total score can range from 0 to 3. A lower score indicates more ADHD.

Teacher rating of the hyperactivity subscale (4 items), one of 3 subscales in the FBB-ADHS. Each item is rated on a scale of 0 = not at all up to 3 = very much. The rating was completed by teachers on Friday afternoon of each week of the study. A total score (sum of all items divided by 4) was calculated. The total score can range from 0 to 3. A lower score indicates more ADHD.

The FBB-ADHS is a 20-item rating scale. Each item describes a typical ADHD symptom. The 20 items are divided into 3 subscales: Attention deficits (9 items), hyperactivity (7 items), and impulsiveness (4 items). Each item is rated on a scale of 0 = not at all up to 3 = very much. The FBB-ADHS was completed by teachers on Friday afternoon of each week of the study. A total score (sum of all items divided by 20) was calculated. The total score can range from 0 to 3. A lower score indicates more ADHD.

The 10-Minute Math Test is a paper and pencil test consisting of several pages of math problems requiring addition, subtraction, multiplication and division calculations presented in ascending order of difficulty during a 10-minute period. Test difficulty was altered for subjects at different skill levels and ages. The number of problems attempted is an objective measure related to "academic productivity". The math test was carried out on the Saturday visit at the end of each of the 2 treatment weeks under supervision of a teacher who had been trained on this test.

The 10-Minute Math Test is a paper and pencil test consisting of several pages of math problems requiring addition, subtraction, multiplication and division calculations presented in ascending order of difficulty during a 10-minute period. Test difficulty was altered for subjects at different skill levels and ages. The number of problems attempted is an objective measure related to "academic productivity". The math test was carried out on the Saturday visit at the end of each of the 2 treatment weeks under supervision of a teacher who had been trained on this test.

The CGI-S is a scale to assess the global severity of illness. The rating is determined by the investigator answering one question: "Considering your total clinical experience with this particular population, how mentally ill is the patient at this time?" Ratings are on a 7-point scale: 1=normal, not at all ill; 2=borderline mentally ill; 3=mildly ill; 4=moderately ill; 5=markedly ill; 6=severely ill; 7=among the most extremely ill patients. The rating is based upon the average observed and reported symptoms, behavior, and function in the past 7 days.

The CGI-I is a scale to assess improvement (change in state) of illness. The rating is based on the investigator answering one question: "Compared to the patient's condition prior to medication, this patient's condition is: 1=very much improved since the initiation of treatment; 2=much improved; 3=minimally improved; 4=no change from baseline (the initiation of treatment); 5=minimally worse; 6= much worse; 7=very much worse since the initiation of treatment." The investigator compares the patient's overall clinical condition to the 1 week period just prior to the initiation of medication.

Standard breakfast (SB) for one week then crossover to very light breakfast (VLB) for one week while taking either 20 mg or 40 mg capsules of methylphenidate once daily based on the dosage the child had taken in the month prior to study start. SB is defined as 450 kcal for girls age 6-9, 490 kcal for boys age 6-9, 550 kcal for girls age 10-12, and 600 kcal for boys age 10-12. VLB is defined as 150 kcal for children age 6-9 and 180 kcal for children age 10-12.

Total of all reporting groups

Safety Population

Standard breakfast (SB) for one week while taking either 20 mg or 40 mg capsules of methylphenidate once daily based on the dosage the child had taken in the month prior to study start. SB is defined as 450 kcal for girls age 6-9, 490 kcal for boys age 6-9, 550 kcal for girls age 10-12, and 600 kcal for boys age 10-12. VLB is defined as 150 kcal for children age 6-9 and 180 kcal for children age 10-12.

Teacher rating of the attention deficit subscale (9 items), one of 3 subscales in the FBB-ADHS. Each item is rated on a scale of 0 = not at all up to 3 = very much. The rating was completed by teachers on Friday afternoon of each week of the study. A total score (sum of all items divided by 9) was calculated. The total score can range from 0 to 3. A lower score indicates more ADHD.

Intent to treat (ITT) population: All randomized patients with at least one post-baseline measurement of the primary endpoint in both study periods.

Teacher rating of the hyperactivity subscale (7 items), one of 3 subscales in the FBB-ADHS. Each item is rated on a scale of 0 = not at all up to 3 = very much. The rating was completed by teachers on Friday afternoon of each week of the study. A total score (sum of all items divided by 7) was calculated. The total score can range from 0 to 3. A lower score indicates more ADHD.

Intent to treat (ITT) population: All randomized patients with at least one post-baseline measurement of the primary endpoint in both study periods.

Teacher rating of the hyperactivity subscale (4 items), one of 3 subscales in the FBB-ADHS. Each item is rated on a scale of 0 = not at all up to 3 = very much. The rating was completed by teachers on Friday afternoon of each week of the study. A total score (sum of all items divided by 4) was calculated. The total score can range from 0 to 3. A lower score indicates more ADHD.

Intent to treat (ITT) population: All randomized patients with at least one post-baseline measurement of the primary endpoint in both study periods.

The FBB-ADHS is a 20-item rating scale. Each item describes a typical ADHD symptom. The 20 items are divided into 3 subscales: Attention deficits (9 items), hyperactivity (7 items), and impulsiveness (4 items). Each item is rated on a scale of 0 = not at all up to 3 = very much. The FBB-ADHS was completed by teachers on Friday afternoon of each week of the study. A total score (sum of all items divided by 20) was calculated. The total score can range from 0 to 3. A lower score indicates more ADHD.

Intent to treat (ITT) population: All randomized patients with at least one post-baseline measurement of the primary endpoint in both study periods.

The FBB-ADHS is a 20-item rating scale. Each item describes a typical ADHD symptom. The 20 items are divided into 3 subscales: Attention deficits (9 items), hyperactivity (7 items), and impulsiveness (4 items). Each item is rated on a scale of 0 = not at all up to 3 = very much. The FBB-ADHS was completed by teachers on Friday afternoon of each week of the study. A total score (sum of all items divided by 20) was calculated. The total score can range from 0 to 3. A lower score indicates more ADHD.

Per protocol (PP) population: All patients in the ITT population who (a) met the inclusion/exclusion criteria liable to affect the efficacy assessment and (b) did not violate the protocol in a manner liable to affect the efficacy assessment.

The 10-Minute Math Test is a paper and pencil test consisting of several pages of math problems requiring addition, subtraction, multiplication and division calculations presented in ascending order of difficulty during a 10-minute period. Test difficulty was altered for subjects at different skill levels and ages. The number of problems attempted is an objective measure related to "academic productivity". The math test was carried out on the Saturday visit at the end of each of the 2 treatment weeks under supervision of a teacher who had been trained on this test.

Intent to treat (ITT) population includes all randomized patients with at least one post-baseline measurement of the primary endpoint in both study periods. Following the intent-to-treat principle, patients were analyzed according to the treatment they were assigned to at randomization.

The 10-Minute Math Test is a paper and pencil test consisting of several pages of math problems requiring addition, subtraction, multiplication and division calculations presented in ascending order of difficulty during a 10-minute period. Test difficulty was altered for subjects at different skill levels and ages. The number of problems attempted is an objective measure related to "academic productivity". The math test was carried out on the Saturday visit at the end of each of the 2 treatment weeks under supervision of a teacher who had been trained on this test.

Intent to treat (ITT) population: All randomized patients with at least one post-baseline measurement of the primary endpoint in both study periods.

The CGI-S is a scale to assess the global severity of illness. The rating is determined by the investigator answering one question: "Considering your total clinical experience with this particular population, how mentally ill is the patient at this time?" Ratings are on a 7-point scale: 1=normal, not at all ill; 2=borderline mentally ill; 3=mildly ill; 4=moderately ill; 5=markedly ill; 6=severely ill; 7=among the most extremely ill patients. The rating is based upon the average observed and reported symptoms, behavior, and function in the past 7 days.

Intent to treat (ITT) population: All randomized patients with at least one post-baseline measurement of the primary endpoint in both study periods.

The CGI-I is a scale to assess improvement (change in state) of illness. The rating is based on the investigator answering one question: "Compared to the patient's condition prior to medication, this patient's condition is: 1=very much improved since the initiation of treatment; 2=much improved; 3=minimally improved; 4=no change from baseline (the initiation of treatment); 5=minimally worse; 6= much worse; 7=very much worse since the initiation of treatment." The investigator compares the patient's overall clinical condition to the 1 week period just prior to the initiation of medication.

Intent to treat (ITT) population includes all randomized patients with at least one post-baseline measurement of the primary endpoint in both study periods. Following the intent-to-treat principle, patients were analyzed according to the treatment they were assigned to at randomization.

Standard breakfast (SB) for one week then crossover to very light breakfast (VLB) for one week while taking either 20 mg or 40 mg capsules of methylphenidate once daily based on the dosage the child had taken in the month prior to study start. SB is defined as 450 kcal for girls age 6-9, 490 kcal for boys age 6-9, 550 kcal for girls age 10-12, and 600 kcal for boys age 10-12. VLB is defined as 150 kcal for children age 6-9 and 180 kcal for children age 10-12.