The mean susceptibility of rim+ and rim− lesions derived from the regression model

Time (yr)	Rim+			Rim−
	No. of Lesions	Mean (ppb)	95% CI	No. of Lesions	Mean (ppb)	95% CI
0	16	13.51	11.09–15.93	16	7.77	6.27–9.26
0.5	10	23.40	19.47–27.33	9	24.39	23.11–25.67
1	7	25.69	20.78–30.60	11	24.22	22.79–25.64
1.5	5	28.99	26.00–31.98	5	26.25	23.86–28.63
2	6	27.33	23.22–31.44	7	16.66	13.57–19.76
2.5	8	26.17	22.10–30.25	10	18.29	15.27–21.31
3	7	21.45	18.31–24.59	9	12.50	10.19–14.81
4	8	22.02	16.92–27.12	10	12.00	9.40–14.61
6	5	13.42	9.64–17.21	6	5.90	4.36–7.45