Table 5.

The association between cyanobacteria concentration (maximum estimate from five pixels) and the cases of respiratory illnesses (sample size = 268); p represents the p-value

Lag (day)	Category of cyanobacteria cellsa	Regression coefficient	95% Confidence Interval		P
0	1	Reference
	2	−2.66	−6.31	0.99	0.153
	3	−1.56	−5.51	2.39	0.440
1	1	Reference
	2	−2.85	−6.25	0.54	0.100
	3	−2.79	−6.47	0.90	0.138
2	1	Reference
	2	1.78	−1.62	5.18	0.304
	3	4.32	0.65	7.99	0.021
3	1	Reference
	2	−0.55	−4.09	3.00	0.762
	3	0.27	−3.56	4.10	0.890
4	1	Reference
	2	−1.69	−5.22	1.84	0.348
	3	−2.72	−6.55	1.12	0.166
5	1	Reference
	2	−0.68	−4.48	3.12	0.727
	3	0.64	−3.50	4.77	0.763

^aCategory 1: <=10,000 cell/mL; Category 2: above 10,000 cell/mL but below or equal to 109,468 cell/mL; and Category 3: > 109,468 cell/mL