Distribution of indoor HONO and indoor and outdoor NO2 from all homes (random and symptomatic sample)
| Min | 25th centile | Median | 75th centile | Max | Duplicate (N) | Median (range) difference between duplicates | 95% limits of agreement for duplicates | |
|---|---|---|---|---|---|---|---|---|
| Readings from one home with values of 393.80 (indoor) and 102.30 (outdoor) have been excluded as values appear implausibly high and it is considered likely that closing times reported are incorrect. | ||||||||
| N.B. Not all homes with HONO measures had indoor or outdoor NO2 measures. | ||||||||
| Indoor HONO (ppb)(n = 255) | 0 | 2.05 | 3.10 | 5.09 | 20.55 | 21 | 0.08 (−0.72 to 0.94) | −0.80 to 0.99 |
| Indoor NO2 (μg/m3) | 5.40 | 14.55 | 24.55 | 42.00 | 113.70* | 23 | 0.29 (−6.03 to 6.10) | −5.40 to 4.25 |
| Indoor NO2 (ppb)(n = 240) | 2.80 | 7.57 | 12.76 | 21.84 | 59.12 | 0.15 (−3.13 to 3.17) | −2.80 to 2.21 | |
| Outdoor NO2(μg/m3) | 0 | 19.50 | 26.60 | 33.00 | 69.40* | 21 | 0.30 (−3.10 to 3.80) | −3.03 to 3.52 |
| Outdoor NO2 (ppb)(n = 239) | 0 | 10.14 | 13.83 | 17.16 | 36.09 | 0.16 (−1.61 to 1.97) | −1.57 to 1.83 | |