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Table 1 The pooled effects of meteorological factors on HFMD occurrences in eight cities

From: Short-term effects of meteorological factors on pediatric hand, foot, and mouth disease in Guangdong, China: a multi-city time-series analysis

  Relative Risk (95 % confidence interval)
  Lag 0 Lag 7 Lag 14 Lag 0–7 Lag 0–14
Temperature (°C, reference at 23.5 °C)a
9.8 (P5) 1.06 (1.04, 1.09)b 0.96 (0.93, 0.98)b 1.03 (0.98, 1.08) 1.02 (0.82, 1.28) 0.83 (0.59, 1.18)
17.4 (P25) 1.03 (1.01, 1.05)b 0.98 (0.97, 0.99)b 1.01 (0.98, 1.04) 0.98 (0.90, 1.07) 0.98 (0.85, 1.13)
27.3 (P75) 0.98 (0.96, 0.99)b 1.04 (1.03, 1.05)b 1.02 (0.99, 1.04) 1.16 (1.08, 1.26)b 1.37 (1.18, 1.59)b
29.7 (P95) 0.95 (0.93, 0.96)b 1.06 (1.05, 1.07)b 1.04 (1.02, 1.05)b 1.19 (1.07, 1.31)b 1.51 (1.29, 1.77)b
Relative humidity (%, reference at 78 %)a
57.0 (P5) 1.03 (1.00, 1.07) 0.97 (0.94, 1.00) 0.99 (0.97, 1.01) 0.96 (0.69, 1.35) 0.85 (0.39, 1.83)
70.3 (P25) 1.02 (1.01, 1.02)b 0.99 (0.98, 0.99)b 0.99 (0.98, 1.01) 0.96 (0.90, 1.03) 0.90 (0.82, 0.99)b
85.0 (P75) 0.98 (0.97, 0.99)b 1.02 (1.01, 1.03)b 1.02 (1.01, 1.03)b 1.03 (1.00, 1.06)b 1.12 (1.02, 1.24)b
94.0 (P95) 0.95 (0.93, 0.97)b 1.01 (1.00, 1.03) 1.01 (0.99, 1.03) 1.02 (0.95, 1.09) 1.01 (0.85, 1.19)
  1. aThe reference value is the median for each meteorological measures
  2. bConfidence intervals that do not overlap the null value of RR = 1