Table 1.
Baseline demographic and clinical data at the beginning of immediate-release methylphenidate treatment
| Total (n = 598) | <6 years (n = 34) | 6–16 years (n = 525) | 17–65 years (n = 37) | |
|---|---|---|---|---|
| Age (years), mean (SD) | 10.85 (6.33) | 5.27 (0.49) | 9.77 (2.37) | 31.26 (10.37) |
| Height (m), mean (SD) | 1.37 (0.16) | 1.11 (0.08) | 1.37 (0.14) | 1.69 (0.11) |
| Weight (kg), mean (SD) | 35.50 (14.23) | 20.81 (3.80) | 35.24 (11.88) | 72.87 (25.01) |
| SBP (mmHg), mean (SD) | 103.8 (13.69) | 93.50 (8.02) | 103.2 (12.80) | 123.1 (16.61) |
| DBP (mmHg), mean (SD) | 65.43 (12.72) | 56.83 (11.38) | 65.66 (12.57) | 71.15 (13.59) |
| Gender, n (%) | ||||
| Male | 482 (80.87) | 31 (91.18) | 423 (80.57) | 28 (75.68) |
| Female | 114 (19.13) | 3 (8.82) | 102 (19.43) | 9 (24.32) |
| Total | 596 (100.0) | 34 (100.0) | 525 (100.0) | 37 (100.0) |
| ADHD subtype, n (%) | ||||
| Predominantly inattentive | 177 (29.7) | 3 (8.8) | 165 (31.4) | 9 (24.3) |
| Predominantly hyperactive-impulsive | 31 (5.2) | 5 (14.7) | 23 (4.4) | 3 (8.1) |
| Combined | 388 (65.1) | 26 (76.5) | 337 (64.2) | 25 (67.6) |
| Familial history, n (%) | ||||
| Yes | 195 (32.61) | 7 (20.59) | 172 (32.64) | 16 (43.24) |
| No | 403 (67.39) | 27 (79.41) | 355 (67.36) | 21 (56.76) |
| Total | 598 (100.0) | 34 (100.0) | 527 (100.0) | 37 (100.0) |
Abbreviations: ADHD, attention deficit hyperactivity disorder; DBP, diastolic blood pressure; SBP, systolic blood pressure; SD, standard deviation.