Table 2 Mean (95% confidence interval) and median (interquartile range) water iodine concentration, WIC (μg/L), and number of water samples
n | Mean (95% confidence interval) | Median (interquartile range) | |
|---|---|---|---|
Ground water and surface water, total | 193 | 4.3 (3.8–4.8) | 4.0 (2.0–5.9) |
Ground water and surface water, coast | 68 | 4.4 (3.5–5.3) | 4.4 (1.4–6.0) |
Ground water and surface water, inland | 125 | 4.4 (3.8–5.1) | 4.0 (2.0–5.0) |
Surface water, coast | 35 | 3.9 (3.0–4.9) | 4.5 (1.5–6.0) |
Groundwater, coast | 33 | 4.9 (3.2–6.6) | 4.0 (1.0–6.0) |
Surface water, inland | 62 | 3.4 (2.8–4.0) | 3.0 (2.0–4.5) |
Groundwater, inland | 63 | 5.1 (3.9–6.2) | 4.0 (2.5–6.8) |
Groundwater and surface water, urban area | 23 | 4.0 (2.8–5.2) | 4.0 (2.0–5.0) |
Surface water, urban area | 15 | 4.4 (3.2–5.6) | 4.5 (3.0–5.7) |
Groundwater, urban area | 8 | 2.7 (0.0–5.8) | 1.3 (0.8–2.9) |
Groundwater and surface water, rural area | 170 | 4.6 (4.0–5.1) | 4.0 (2.0–6.0) |
Surface water, rural area | 82 | 3.4 (2.9–4.0) | 3.0 (1.5–4.5) |
Groundwater, rural area | 88 | 5.2 (4.2–6.2) | 4.0 (2.4–7.1) |
Surface water, total | 97 | 3.6 (3.0–4.1) | 3.5 (1.5–4.5) |
Groundwater, total | 96 | 5.0 (4.1–5.9) | 4.0 (2.0–6.6) |