Relationship between exhaled NO and pollen count
| Time period | Exhaled NO (ppb) | Standardised exhaled NO (ppb) |
|---|---|---|
| Data from 44 subjects assessed a total of 122 times during the pollen season. Relationship examined for the mean pollen count during different time periods from the day that exhaled NO was measured (day 0) to 14 days before (day −14). Data presented as regression coefficients (95% confidence intervals) with their associated p values for the relationship between exhaled NO levels and the pollen count were estimated using a time series regression model. Bonferroni correction for multiple comparisons was applied to p values. | ||
| Day 0 | ||
| Regression coefficient | 0.0634 | 0.0089 |
| 95% CI | (0.0095 to 0.1173) | (0.004 to 0.013) |
| p value | 0.210 | 0.01 |
| Day 0 to −2 | ||
| Regression coefficient | 0.1298 | 0.0129 |
| 95% CI | (0.0775 to 0.1822) | (0.0086 to 0.0173) |
| p value | <0.001 | <0.01 |
| Day 0 to −0.6 | ||
| Regression coefficient | 0.1394 | 0.0132 |
| 95% CI | (0.0907 to 0.1881) | (0.0090 to 0.0174) |
| p value | <0.001 | <0.01 |
| Day 0 to −13 | ||
| Regression coefficient | 0.1255 | 0.0120 |
| 95% CI | (0.0764 to 0.1747) | (0.0077 to 0.0163) |
| p value | <0.001 | <0.01 |
| Day −1 to −5 | ||
| Regression coefficient | 0.1364 | 0.0146 |
| 95% CI | (0.0750 to 0.1978) | (0.0096 to 0.0196) |
| p value | <0.001 | <0.01 |
| Day −2 to −5 | ||
| Regression coefficient | 0.1332 | 0.0112 |
| 95% CI | (0.0734 to 0.1930) | (0.0061 to 0.0163) |
| p value | <0.001 | <0.01 |
| Day −1 to −7 | ||
| Regression coefficient | 0.1251 | 0.0144 |
| 95% CI | (0.0732 to 0.1771) | (0.0103 to 0.0186) |
| p value | <0.001 | <0.01 |
| Day −2 to −7 | ||
| Regression coefficient | 0.0131 | 0.0131 |
| 95% CI | (0.0088 to 0.0173) | (0.0088 to 0.0173) |
| p value | <0.001 | <0.01 |
| Day −8 to −14 | ||
| Regression coefficient | 0.0499 | 0.0081 |
| 95% CI | (0.0020 to 0.0979) | (0.0041 to 0.0121) |
| p value | 0.410 | <0.01 |