Non-PRO English to French Other Safety Policing criminal statistics

Context:

Crime statistics for xxx jurisdiction, disaggregated by area, seem to confirm that reported crime is indeed high in Area 47.
Area 18, another high-density area with formal settlements, also registered a high crime rate.
This could be attributed to the proximity of Area 18 to yyyi, another informal settlement which borders Area 18.
Further, many houses in Area 18 are not fenced, which provides easier access to potential thieves.
Together, these two areas make up 30% of crimes recorded at (xxx).
These statistics have not yet been contrasted with accurate population data, but this does seem disproportionate.
Of course, this could also reflect variances in the likelihood of populations living in Areas 47 and 18 reporting crime, in comparison with those living in informal settlements.

In reality this question is not strictly about the above term, but about the best way to translate or even really understand the following passage:

"Of course, this could also reflect variances in the likelihood of populations living in Areas 47 and 18 reporting crime, in comparison with those living in informal settlements."

Firstly, areas 47 and 49 ARE informal settlements themselves, which makes me think that their crime statistics should be compared to formal settlements, not informal settlements.

Secondly, even apart from that issue, I just can't seem to find an elegant way of expressing this sentence in French.
"Ce taux de criminalité élevé pourrait refleter la différence de probabilité que les populations vivant dans les zones 47 et 18 signalent les crimes, par rapport à ceux qui vivent dans [d'autres] établissements informels. "

I would be happy to have your suggestions.