Table 2.
Temporal Transitions in Selected Study Population characteristics and FeNO Levels
| Variable | Year5– Year6 Transition Categories | N (%) | GM of Yr5 FeNO (G.S.D.)* | P-Value | Mean of FeNO Change (S.D.) | P-Value |
|---|---|---|---|---|---|---|
| Season | Warm-Warm | 226 (18.7) | 15.9 (16.6) | 0.16 | 2.5 (11.7) | 0.33 |
| Cold-Warm | 368 (30.4) | 14.1 (15.9) | 1.1 (12.0) | |||
| Warm-Cold | 213 (17.6) | 15.6 (16.9) | 1.1 (12.9) | |||
| Cold-Cold | 404 (33.4) | 16.9 (18.8) | 0.5 (14.7) | |||
| Asthma | No Asthma-No Asthma | 1052 (86.9) | 14.5 (14.8) | <0.01 | 1.4 (12.4) | 0.07 |
| No Asthma-Asthma | 23 (1.9) | 27.7 (40.3) | −4.2 (27.6) | |||
| Asthma-Asthma | 136 (11.2) | 22.3 (25.0) | 0.01 (14.6) | |||
| Allergy | No Allergy-No Allergy | 441 (36.4) | 13.0 (12.7) | <0.01 | 0.8 (10.7) | 0.54 |
| No Allergy-Allergy | 44 (3.6) | 13.3 (8.6) | 3.1 (9.6) | |||
| Allergy-Allergy | 726 (59.9) | 17.3 (19.7) | 1.2 (14.5) | |||
| Second Hand Smoking | No SHS-No SHS | 1128 (93.15) | 15.4 (16.5) | 0.11 | 1.4 (12.5) | 0.04 |
| (SHS) | No SHS-SHS | 20 (1.65) | 24.6 (43.2) | −3.2 (28.6) | ||
| SHS-No SHS | 26 (2.15) | 15.7 (11.7) | −2.9 (6.8) | |||
| SHS-SHS | 13 (1.07) | 19.2 (27.4) | −5.5 (27.8) |
*
Results based on Geometric means (GM) and standard deviations (GSD) due to skewness of Year 5 FeNO data.