vars_ph_p_sds__does: Compute "Sleep Disturbance Scale [Parent] (Disorders of excessive
somnolence): Sum [Validation: No more than 0 missing or declined]"
Description
Computes the summary score ph_p_sds__does_sum
Sleep Disturbance Scale [Parent] (Disorders of excessive somnolence): Sum
[Validation: No more than 0 missing or declined]