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. Author manuscript; available in PMC: 2014 Dec 31.
Published in final edited form as: Int J Infect Dis. 2012 Aug 9;16(11):e793–e798. doi: 10.1016/j.ijid.2012.07.002

Table 3.

Inter-epidemic spells

Covariate Coefficient SE CI
Mean temperature 0.543 0.0243 (0.4954, 0.5906)
Total precipitation 0.0014 0.0001 (0.0012, 0.0015)
Density −0.0012 0.0004 (−0.0020, −0.0005)
Time −0.0491 0.0117 (−0.0720, −0.0262)
Time2 0.0013 0.0003 (0.0007, 0.0019)
Drought −1.0717 0.4479 (−1.9496, −0.1938)
Flood 0.1606 0.2458 (−0.3212, 0.6424)
Storm 0.3841 0.2897 (−0.1837, 0.9519)

SE, standard error; CI, confidence interval.

‘Time’ is the linear term for time whereas ‘Time2’ is the quadratic term. Inclusion of the quadratic term allows the effect of time to vary non-linearly.