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| Total population | Females | Males | P-value | |
|---|---|---|---|---|
| Measurement no. 1, μg/l, mean (±s.d.) | 67.1 (16.8) | 68.8 (17.8) | 65.2 (15.4) | T=2.8; P=0.006 |
| Measurement no. 2 after 48 months, μg/l, mean (±s.d.) | 71.6 (24.9) | 70.80 (25.9) | 72.5 (23.9) | T=0.32; P=0.75 |
Abbreviations: Se, selenium; T, T-statistics.
Measurement no. 1 consisted of 668 individuals. Measurement no. 2 consisted of 98 control individuals from the above population.
