Table 3 Total blood mercury concentrations by characteristics related to shark-meat consumption
Characteristics | Number (%) | Concentrationsa | p-valueb |
|---|---|---|---|
Intake frequency | |||
 Rarely | 374 (49.7) | 3.70 (3.48–3.93) | <0.001 |
 Only during Jesa | 365 (48.5) | 4.52 (4.25–4.81) |  |
 During and besides Jesa | 14 (1.9) | 5.95 (4.37–8.09) |  |
Annual intake (times per year) | |||
 0 | 374 (49.7) | 3.71 (3.49–3.94) | <0.001 |
 1–2 | 212 (28.2) | 4.29 (3.97–4.65) |  |
 3–4 | 103 (13.7) | 4.61 (4.12–5.17) |  |
 5≤ | 64 (8.5) | 5.43 (4.71–6.26) |  |
Date of most recent intake (days ago) | |||
  ≤ 7 | 11 (1.5) | 7.33 (5.15–10.43) | 0.015 |
 8–30 | 24 (3.2) | 4.29 (3.35–5.50) |  |
 31≤ | 173 (23.0) | 4.12 (3.70–4.59) |  |
 rarely | 545 (72.4) | 4.06 (3.84–4.28) |  |
Amount of most recent intake (g) | |||
 rarely | 545 (72.4) | 4.06 (3.84–4.29) | 0.457 |
  ≤ 25 | 66 (8.8) | 3.92 (3.35–4.57) |  |
 26–50 | 86 (11.4) | 4.37 (3.80–5.02) |  |
 51≤ | 56 (7.4) | 4.53 (3.82–5.38) |  |