Nocturnal Gastro-esophageal Reflux Disease Symptom Severity and Impact Questionnaire (N-GSSIQ)
Name of questionnaire | Nocturnal Gastro-esophageal Reflux Disease Symptom Severity and Impact Questionnaire (N-GSSIQ) |
Type of questionnaire | Assesses the severity, frequency and impact of nocturnal GERD symptoms in adults, age range 27–73 years |
Number of items | 20 |
Number of domains /categories/subscales | 3 subscales |
Name of subscales | Nocturnal GERD symptoms, Morning Impact of Nocturnal GERD and Concern about Nocturnal GERD |
Scaling of items | 0-5 or 0-4 |
Scoring available: with permission or free | Information not available |
Test-retest reliability | Yes |
Validity of questionnare established | Yes, correlated with physician diagnosis of GERD and other GERD questionnaires; patients had GERD diagnosed by pH probe or endoscopy or response to medications etc |
Internal consistency | Yes (Cronbach's alpha 0.84-0.94) |
Language | English |
Translations in other languages (if yes, then list the languages) | Not applicable |
Developer name | B.M. Spiegel,MD,et al |
Developer contact information | bspiegel@mednet.ucla.edu |
Availability of questionnaire: | Use with permission of developer |
Limitations | A 2-week recall period of the measure that may does not allow for measurement of patient day-to-day variability. |
Link to the questionnaire (if available) | Available as supplemental file to original publication |
Other comments | Patient-rated scale. Scales were significantly correlated with similar measures and disease severity (0.41–0.81; P < 0.0001). |
References (original publication) | Spiegel BM, Roberts L, Mody R, Harding G, Kothari-Talwar S, Kahrilas PJ, Camilleri ML, Dabbous O, Revicki DA. The development and validation of a Nocturnal Gastro-oesophageal Reflux Disease Symptom Severity and Impact Questionnaire for adults. Aliment Pharmacol Ther. 2010 Aug;32(4):591-602. |