  We give a direct computational proof that the degree 1 part of the
Le-Murakami-Ohtsuki invariant of a closed oriented 3-manifold M is determined
by the Casson-Walker-Lescop invariant. Moreover, if the first Betti number of M
is equal to 2, the Le-Murakami-Ohtsuki invariant is determined by the Lescop
generalization of the Casson-Walker invariant.
