Table 2.

Correlation between seasonal mean cholera incidence and large-scale hydroclimatic controls in the Ganges-Brahmaputra-Meghna Basin region^*

Location	Cholera season	Low flow	Estuarine salinity	High flow	Flood extent
Dhaka, Bangladesh (n = 20)	Spring	−0.48†	0.68‡	−	−
	Fall	−0.48†	0.86‡	0.69‡	0.77‡
Matlab, Bangladesh (n = 10)	Spring	−0.64†	0.41	−	−
	Fall	−0.52	0.36	0.86‡	0.81†
Bakerganj, Bangladesh (n = 10)	Spring	−0.44	0.67†	−	−
	Fall	−0.23	0.63†	0.40	0.37
Kolkata, India (n = 10)	Spring	−0.79†	0.63†	−	−
	Fall	−0.67†	0.25	0.81†	0.79†

^*n = no. of years of data used in the analysis (n = 20: 1988–2007; n = 10: 1998–2007).

^†0.05 > P > 0.01.

^‡P < 0.01.