  We improve estimates of stellar mass and mass-weighted average age of Type Ia
supernova (SN Ia) host galaxies by combining UV and near-IR photometry with
optical photometry in our analysis. Using 206 SNe Ia drawn from the full
three-year SDSS-II Supernova Survey (median redshift of z {\approx} 0.2) and
multi-wavelength host-galaxy photometry from SDSS, GALEX, and UKIDSS, we
present evidence of a correlation (1.9{\sigma} confidence level) between the
residuals of SNe Ia about the best-fit Hubble relation and the mass-weighted
average age of their host galaxies. The trend is such that older galaxies host
SNe Ia that are brighter than average after standard light-curve corrections
are made. We also confirm, at the 3.0{\sigma} level, the trend seen by previous
studies that more massive galaxies often host brighter SNe Ia after light-curve
correction.
