The respiratory disturbance index is similar to the apnea-hypopnea index; however, it also includes respiratory events that do not technically meet the definitions of apneas or hypopneas, but do disrupt sleep.
Hingamisteede häireid indeks on sarnane uneapnoe-hypopnea indeks; siiski, see hõlmab ka hingamisteede sündmusi, mida ei ole tehniliselt vastama määratlused apneas või hypopneas, kuid ei häiri magada.