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Table 2 Correlation of monthly rates of invasive pneumococcal disease with rates of respiratory virus infection in concurrent and preceding month. Catalonia, 2006–2012

From: Invasive pneumococcal disease rates linked to meteorological factors and respiratory virus circulation (Catalonia, 2006–2012)

Variable All ages <5 years 5–64 years ≥65 years
  No lag a (p-value) 1-month lag b (p-value) No laga (p-value) 1-month lagb (p-value) No laga (p-value) 1-month lagb (p-value) No laga (p-value) 1-month lagb (p-value)
Influenza 0.71
(<0.001)
0.64
(<0.001)
0.60
(<0.001)
0.57
(<0.001)
0.65
(<0.001)
0.57
(<0.001)
0.41
(<0.001)
0.36
(0.001)
RSV 0.77
(<0.001)
0.80
(<0.001)
0.63
(<0.001)
0.61
(<0.001)
0.50
(<0.001)
0.44
(<0.001)
0.38
(<0.001)
0.38
(<0.001)
Adenovirus 0.61
(<0.001)
0.39
(<0.001)
0.55
(<0.001)
0.32
(0.003)
0.23
(0.040)
0.17
(0.137)
0.09
(0.396)
−0.05
(0.663)
Temperature −0.85
(<0.001)
−0.84
(<0.001)
−0.65
(<0.001)
−0.64
(<0.001)
−0.82
(<0.001)
−0.82
(<0.001)
−0.87
(<0.001)
−0.86
(<0.001)
Humidity 0.48
(<0.001)
0.62
(<0.001)
0.39
(<0.001)
0.56
(<0.001)
0.46
(<0.001)
0.60
(<0.001)
0.48
(<0.001)
0.63
(<0.001)
Sunshine hours −0.67
(<0.001)
−0.79
(<0.001)
−0.53
(<0.001)
−0.62
(<0.001)
−0.65
(<0.001)
−0.76
(<0.001)
−0.67
(<0.001)
−0.81
(<0.001)
Wind speed −0.31
(0.005)
−0.58
(<0.001)
−0.29
(0.008)
−0.54
(<0.001)
−0.30
(0.006)
−0.57
(<0.001)
−0.28
(0.010)
−0.54
(<0.001)
Days with rainfall 0.29
(0.008)
0.25
(0.021)
0.25
(0.024)
0.24
(0.031)
0.30
(0.006)
0.25
(0.022)
0.27
(0.013)
0.27
(0.013)
  1. Abbreviations: RSV respiratory syncytial virus
  2. Note: Numbers are Spearman’s rank correlation coefficients
  3. aConcurrent month
  4. bPreceding month