According to the UNSCEAR modeling, based on these miner's studies, the excess relative risk from long-term residential exposure to radon at 100 Bq/m3 is considered to be about 0.16 (after correction for uncertainties in exposure assessment), with about a threefold factor of uncertainty higher or lower than that value.[1] In other words, the absence of ill effects (or even positive hormesis effects) at 100 Bq/m3 are compatible with the known data.