'Statistically significant associated to' — [Adv + Adj] as Adv?

Is 'XXX is statistically significant associated to YYY.' grammatically correct ? One of my friends says this is seen in many papers with statistics.

Shouldn't it be '... statistically significantly associated to ...' which has one Adv (statistically) describing another (significantly) ? Or this [Adv + Adj] can function as Adv as well ? (I don't think so) Or I misunderstood that it must be an adverb there ?

[EDIT]
Testing and Contrasting Road Safety Education …

In model 4 we observe that variables RSET and DT are positive. This implies that a male driver who either had not graduated from a professional driving school or had not been issued a traffic ticket is less likely to engage in DD, than a male driver who had graduated from a professional driving school and had been issued a traffic ticket. However, between these two variables only DT is statistically significant associated to the odds ratio of DD. This association remains significant even with the introduction of two control variables which are also statistically significant. Specifically, both a decrease of YFE and an increase on YDE are associated to a decrease of the odds ratio of engaging on DD. [emphasis mine -Kris]

No, it is not correct. A grammatically correct alternative that I'd suggest is:

statistically significant with respect to

See these references.