Comparisons were made during the months prior to and after the month of sitting onset. In addition, parents were asked to do the Timed Sitting test twice per week at home to corroborate the onset of independent sitting ability. In this test parents placed the child in sitting with legs in front and timed how long they could stay upright with hands free. Table 1 shows the clinical scores of all subjects (collapsed across 2 sessions at each month with respect to sitting onset).
Segmental Assessment of Trunk Control (SATCo)
The SATCo is a clinical measure that examines balance control of the trunk while the evaluator manually supports the trunk