I have the following table and its interpretation, but I do not understand where the (1) results come from, can you help me please?

I have the following table and its interpretation, but I do not understand where the Δχ²(1) results come from, can you help me please?

Consistent with Study 1, individuals who seek engagement in life were grittier ( β = .32, p < .001), as were those who seek meaning ( β = .19, p < .001), but individuals who seek pleasure in life were lower in grit