The association between the incidence of mumps and meteorological parameters in Taiwan

Figures & data

Table 1. Demographic characteristics of patients with mumps in Taiwan, 2006–2011

Variables	Case number (%) N = 6612	Annual incidence rate per 100,000
Total	6612	4.8
Gender
Male	4077 (61.7)	5.9
Female	2535 (38.3)	3.7
Age groups (years)
≦4	1368 (20.7)	22.5
5–10	2655 (40.2)	28.4
11–19	865 (13.1)	5.1
≧20	1724 (26.1)	1.6
Region of residence
Northern	3676 (55.6)	6.0
Central	1342 (20.3)	3.9
Southern	1325 (20.0)	3.5
Eastern	269 (4.1)	7.8
Seasons
Spring	1456 (22.0)	1.05
Summer	2085 (31.5)	1.51
Autumn	1769 (26.8)	1.28
Winter	1302 (19.7)	0.94

Figure 1. Trends in monthly mumps infection during 2006–2011 in Taiwan.

Table 2. Weekly weather pattern 8–14 d prior to symptom onset and the incidence of mumps virus infection in Taiwan, 2006–2011

	Univariate Models				Multivariable Model
	IRR	95% CI		P-value	IRR	95% CI		P-value
Mean temperature, mean, °C	1.035	1.022,	1.047	< 0.0001	1.039	1.027,	1.051	< 0.0001
Difference in temperature, mean, °C	1.130	1.014,	1.260	0.027
Relative humidity, mean, %	1.012	0.987,	1.037	0.357
Vapor pressure, mean, 5-hPa	1.024	1.015,	1.033	< 0.0001	1.028	1.019,	1.037	< 0.0001
Cumulative precipitation, mm	1.001	1.0003,	1.003	0.011
Precipitation time, hr	0.998	0.996,	1.0004	0.114
Cumulative sunshine hours, hr	1.002	1.001,	1.007	0.002

Figure 2. (A) The average case count of mumps infections at various temperature domains. (B) The average case count of mumps infections at various vapor pressure domains.

Figure 3. (A) Conditional logistic regression results for mumps, with temperature and school days as explanatory variables. (B) Conditional logistic regression results for mumps, with vapor pressure and school days as explanatory variables.