In the formula, Qstep step one and Qdos are the estimates of the subgroups. SE1 and SE2 represent their respective standard errors. 1 and SE1 indicated the estimated values and standard errors for males, respectively, while Q2 and SE2 were the corresponding values for females.
The robustness of model try looked at using multiple sensitivity analyses. Very first, we constructed a couple of- and three-pollutant habits to evaluate the fresh confounding effects. 2nd, we varied the fresh 6–9 df having temporary trend. Third, we also altered the brand new df (3–5) to your one or two meteorological items.
The R software (cuatro.2.1) was applied for all mathematical analyses contained in this research. If toxin quantity improved of the ten ?g/m 3 , the fresh new associated RR and you will 95% CI off appendicitis hospitalizations had been shown while the overall performance.
Efficiency
Table 1 summarizes the descriptive characteristics of appendicitis admissions and environmental variables. In this study, 1,427 hospitalizations for appendicitis were included. Among these cases, 82.9% (1,183 cases) were males and 77.8% (1,110 cases) were 21–39 years old. Regarding air pollutants, the daily average concentrations were ?g/m 3 (ranging from 16 to 658 ?g/m 3 ) for PM10, ?g/m 3 (ranging from 4 to 858 ?g/m 3 ) for SO2 and ?g/m 3 (ranging from 6 to 124 ?g/m 3 ) for NO2. Read More…