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We discuss 94 Extended Green Objects (EGOs) in the northern Galactic planecataloged by Cyganowski et al, based on near-infrared narrowband H2 (2.122{\mu}m and continuum observations from the United Kingdom Infrared Telescope.This data set is three times larger than our previous study, and is unbiased bypreselection. As discussed in the previous paper, the morphologies of the 4.5{\mu}m emission generally resemble those of the near-infrared continuum, butare different from those of the H2 emission. Of our sample, only 28% of EGOswith H2 emission show similar morphologies between 4.5 {\mu}m and H2 emission.These results suggest that the 4.5 {\mu}m emission mainly comes from scatteredcontinuum from the embedded young stellar object (YSO), and partially from H2emission. About half of EGOs are associated with H2 outflows, if the H2 outflowincompleteness is considered. The H2 outflow detection rate for EGOs withK-band detections (61%) is significantly higher than for those without K-banddetections (36%). This difference may be due to the fact that both H2 andK-band emissions are associated with outflows, i.e., H2 emission and K-bandcontinuum are associated with shocks and outflow cavities, respectively. Wealso compared the correlation between the H2 outflows and Class I 44 GHzmethanol masers from literature. The methanol masers can be located upstream ordownstream of the H2 outflows and some bright H2 spots or outflows are notassociated with methanol masers, suggesting that methanol masers and H2emission trace different excitation conditions.

Near-infrared H2 and Continuum Survey of Extended Green Objects. II. Complete Census for the Northern Galactic Plane