vars_ph_p_sds__dims: Compute "Sleep Disturbance Scale [Parent] (Disorders of initiating and
maintaining sleep): Sum [Validation: No more than 0 missing or declined]"
Description
Computes the summary score ph_p_sds__dims_sum
Sleep Disturbance Scale [Parent] (Disorders of initiating and maintaining
sleep): Sum [Validation: No more than 0 missing or declined]