Salivary nitrite and nitrate concentrations (µM) before and after nitrate ingestion and 5 minutes after chlorhexidine mouthwash
| Time (minutes) | Mouthwash | ||||
|---|---|---|---|---|---|
| −30 | 0 | 30 | 60 | ||
| ND, not determined. | |||||
| **p<0.01 compared with before nitrate ingestion (0 minutes). | |||||
| †††p<0.001 compared with before mouthwash (60 minutes). | |||||
| Tracheostomised subjects | |||||
| Nitrite | 135 (33) | 64 (12) | 860 (244)** | 1093 (220)** | ND |
| Nitrate | 407 (99) | 806 (424) | 7397 (1748)** | 9596 (1831)** | ND |
| Non-tracheostomised subjects | |||||
| Nitrite | 150 (31) | 236 (91) | ND | 1263 (282)** | 353 (75)††† |
| Nitrate | 1348 (228) | 1288 (229) | ND | 10852 (1198)** | 10397 (1361)** |