| Income is partly a proxy for measured and unmeasured characteristics of the parents and family that benefit the child. |
| The variables in our data set explain only a small amount of the tidal volume variance, suggesting other unmeasured factors influence treatment. |
| This finding suggests that day-to-day changes in SO 2 in Europe may be a surrogate for daily changes in some other, unmeasured factor. |
| Adjustment had little impact on measures of association, but confounding by unmeasured factors cannot be ruled out. |
| Thirdly, there's some unmeasured risks really associated with the technology which other energy technologies simply don't have. |
| A sort of affinity and identification contributed to the unmeasured success of the play. |
