Table 3

Monthly mean temperature correlated with malaria cases in 1800–1870.

Month of preceding year correlated with malaria cases in 1800–1870
Source of temperature series



Helsinki 1830–1870
41 years
Tornedalen 1818–1870
53 years
Stockholm 1800–1870
71 years
St. Petersburg 1806–1870
65 years

malaria year-1; May
0.1487
0.0269
0.0511
0.1338
malaria year-1; June
0.4301 **
0.5289 ***
0.3372 **
0.3587 **
malaria year-1; July
0.4628 **
0.4135 **
0.4543 ***
0.2888 *
malaria year-1; August
0.2672°
0.1570
0.2740 *
0.1793
malaria year-1; September
0.1156
0.0655
0.0637
0.0678
malaria year-1; October
0.1566
0.0200
0.1326
0.2657 *
malaria year-1; November
0.1462
0.1958
0.0000
0.0220
malaria year-1; December
0.0037
-0.002
-0.1144
-0.1221

Huldén et al. Malaria Journal 2005 4:19   doi:10.1186/1475-2875-4-19