marginal significancep-value ≤ 0.1
All statistical analyses were performed using SAS 9.2 (SAS Institute Inc., Cary, NC, USA) and statistical significance was set as a p-value ≤ 0.05 and marginal significance at 0.05 < p-value ≤ 0.1.
All statistical analyses were performed using SAS 9.2 (SAS Institute Inc., Cary, NC, USA) and statistical significance was set as a p-value ≤ 0.05 and marginal significance at 0.05 < p-value ≤ 0.1.
However, the odds of mild wheezing, SOB on exertion, and nasal symptoms generally decreased over the study period although they did not reach statistical significance, except for nasal symptoms.
There were significant or marginally significant interactions between the tenure group and the survey year for difficulty concentrating and excessive fatigue, respectively.