ðɪ ˌɑːɹdˌiːˈaɪ ɪz sˈɪmɪlɚ tə ðɪ ˌeɪˌeɪtʃˈaɪ, haʊˈɛvɚ, ˌɑːɹdˌiːˈaɪ ˈɔːlsoʊ ɪŋklˈuːdz ɹˈɛspɹətˌoːɹi ᵻvˈɛnts ðæt duːnˌɑːt tˈɛknɪkli mˈiːt ðə dˌɛfɪnˈɪʃənz ʌv ɐpnˈiəz ɔːɹ hˌaɪpoʊpnˈiːz, sˈʌtʃ ɐz ɐ ɹˈɛspɹətˌoːɹi ˈɛfɚt ɹᵻlˈeɪɾᵻd ɚɹˈaʊzəl ɹᵻɹˈæ, bˌʌt dˈuː dɪsɹˈʌpt slˈiːp.
The RDI is similar to the AHI, however, RDI also includes respiratory events that do not technically meet the definitions of apneas or hypopneas, such as a Respiratory Effort Related Arousal (RERA), but do disrupt sleep.