Table 1.

Comparisons in the survival time of Bulinus globosus snails maintained at different temperature levels

Temperature (°C) groups	Chi-square	Hazard ratio	95% CI of ratio
15.5 vs 21.2	6.470	0.224*	0.071 – 0.709
15.5 vs 25.8	5.450	0.238*	0.072 – 0.795
15.5 vs 31.0	42.400	0.063***	0.027 – 0.144
21.2 vs 25.8	0.176	0.827	0.339 – 2.014
21.2 vs 31.0	16.050	0.223***	0.107 – 0.465
25.8 vs 31.0	11.920	5.182***	2.459 – 10.92

Significance codes: *0.05, ***0.0001