Table 4.

Generalized Linear Model Analysis of Environmental Factors Influencing Cercariae Concentrations.

Main effects	P value
Wind direction	< 0.0001*
Lake	< 0.0001*
Week	< 0.0001*
Time of day (am/pm)	0.59

Parameter	β	Confidence interval	P value
Parameter estimates
Wind
Onshore wind	0.89	0.23–1.5	0.008*
Alongshore wind	1.2	0.57–1.8	< 0.0001*
Offshore wind	0.48	− 0.24 to 1.2	0.19
Lake
North Leelanau	− 1.213	− 1.7 to − 0.7	< 0.0001*
Lime Lake	− 1.825	− 2.3 to − 1.3	< 0.0001*
Higgins	− 1.406	− 0.77 to − 0.72	< 0.0001*
Glen Lake	− 0.077	− 0.47 to 0.14	0.70
South Leelanau	− 0.045	− 0.42 to 0.50	0.85
Crystal	0.045	− 0.42 to 0.50	0.85
Week
Week 1	− 0.74	− 1.5 to 0.05	0.07
Week 2	− 0.58	− 1.2 to 0.70	0.08
Week 3	− 0.13	− 0.75 to 0.50	0.70
Week 4	0.63	0.03 to 1.23	0.04*
Week 5	− 0.12	− 0.8 to 0.50	0.72
Week 6	− 0.42	− 1.2 to 0.30	0.25
Week 7	0.38	− 0.43 to 1.2	0.36
Week 8	2.53	1.9 to 3.2	< 0.0001*
Week 9	0.738	− 0.58 to 0.9	0.07
Time of day
Morning (8 a.m.–12 p.m.)	0.08	− 0.20 to 0.36	0.60
Afternoon (12 p.m.–8 a.m.)	0.08	− 0.20 to 0.36	0.60

*Statistically significant (P < 0.05)