Adjusted associations between 24 hour concentrations of particle number and baseline lung functions
| Pollutant | FVC (l) | FEV1 (l) | MMEF (l/s) | AEFV (l2/s) |
|---|---|---|---|---|
| *p<0.05; **p<0.01. | ||||
| The recordings (n=99) were made between 8 February and 9 April 1994. The regression coefficients (SEs) are expressed for an interquartile increase in the concentration of the pollutant. | ||||
| PNC 0.01–0.03: | ||||
| Lag0 | 12.5 (9.87) | 8.40 (12.8) | 12.3 (41.4) | −0.053 (0.070) |
| Lag1 | 7.22 (7.06) | −4.43 (8.96) | −27.5 (28.7) | −0.070 (0.050) |
| Lag2 | −1.20 (5.01) | −5.51 (6.25) | 1.53 (20.0) | −0.010 (0.036) |
| Lag3 | −12.8 (7.43) | −15.2 (8.70) | −28.1 (27.5) | −0.056 (0.047) |
| 4 Day mean | 0.200 (8.08) | −13.2 (10.1) | −32.5 (32.9) | −0.084 (0.057) |
| PNC 0.03–0.1: | ||||
| Lag0 | 16.2 (11.7) | 19.0 (15.1) | 2.24 (4.92) | −0.032 (0.083) |
| Lag1 | 1.37 (5.25) | −10.7 (6.50) | −36.4 (20.9) | −0.083 (0.036)* |
| Lag2 | −4.46 (4.29) | −9.27 (5.31) | −2.94 (17.3) | −0.040 (0.031) |
| Lag3 | −12.7 (4.93)* | −14.0 (5.83)* | −28.0 (18.7) | −0.052 (0.032) |
| 4 Day mean | −7.46 (6.64) | −19.5 (8.18)* | −43.4 (27.0) | −0.107 (0.047)* |
| PNC 0.1–0.3: | ||||
| Lag0 | 5.36 (9.54) | 3.58 (12.3) | −36.8 (39.6) | −0.027 (0.068) |
| Lag1 | −3.23 (4.29) | −12.3 (5.23)* | −29.4 (17.2) | −0.068 (0.029)* |
| Lag2 | −6.54 (3.83) | −10.9 (4.74)* | −6.65 (15.7) | −0.054 (0.027)* |
| Lag3 | −9.50 (3.79)* | −11.5 (4.44)* | −22.5 (14.4) | −0.047 (0.024)* |
| 4 Day mean | −10.5 (5.47) | −20.4 (6.70)** | −40.0 (22.5) | −0.104 (0.039)** |
| PNC 0.3–1.0: | ||||
| Lag0 | −3.87 (6.26) | −4.35 (8.09) | −31.0 (25.9) | −0.024 (0.044) |
| Lag1 | −14.3 (6.51)* | −22.9 (8.03)** | −45.8 (26.8) | −0.072 (0.047) |
| Lag2 | −10.3 (6.13) | −22.4 (7.32)** | −26.7 (24.9) | −0.120 (0.042)** |
| Lag3 | −5.10 (3.73) | −8.07 (4.32) | −11.7 (13.8) | −0.042 (0.023) |
| 4 Day mean | −14.3 (6.98)* | −26.5 (8.57)** | −49.9 (28.9) | −0.136 (0.049)** |
| PNC 1.0–3.2: | ||||
| Lag0 | 8.60 (9.15) | 10.8 (11.8) | −10.4 (38.3) | −0.034 (0.065) |
| Lag1 | 1.05 (4.88) | −9.54 (6.04) | −35.6 (19.4) | −0.075 (0.033)* |
| Lag2 | −4.18 (4.04) | −7.62 (5.03) | 0.980 (16.3) | −0.026 (0.029) |
| Lag3 | −13.2 (4.98)* | −14.1 (5.91)* | −29.0(19.0) | −0.052 (0.032) |
| 4 Day mean | −7.80 (6.53) | −18.5 (8.08)* | −43.3 (26.6) | −0.100 (0.046)* |
| PNC 3.2–10: | ||||
| Lag0 | 2.85 (5.88) | 5.07 (7.58) | 0.938 (24.5) | −0.030 (0.041) |
| Lag1 | 0.451 (4.35) | −8.30 (5.39) | −32.2 (17.2) | −0.068 (0.030)* |
| Lag2 | −2.59 (3.36) | −5.54 (4.19) | 2.35 (13.5) | −0.014 (0.024) |
| Lag3 | −11.8 (4.48)* | −13.4 (5.27)* | −28.0 (16.9) | −0.051 (0.029) |
| 4 Day mean | −6.69 (5.71) | −15.9 (7.06)* | −36.0 (23.2) | −0.088 (0.040)* |