The phrase "are often attributable" is correct and usable in written English.
It can be used when discussing causes or reasons for certain outcomes or phenomena.
Example: "The discrepancies in the data are often attributable to human error during the collection process."
Alternatives: "are frequently linked to" or "can often be traced back to".
In general, there's also a whole mountain of academic research into voter fraud, which is largely in agreement that it's essentially a nonissue, and that isolated cases that may appear to be "fraud" are often attributable to mistakes, clerical errors or carelessness.
The failings in PQ that many of us complain about are often attributable directly to programme makers and so, clearly, the BBC has to redouble its efforts to bring them to account.
TKA infections are often attributable to staphylococci and streptococci, whereas aerobic gram-negative bacteria cause 10 20 % of all infections and anaerobic bacteria are responsible for another 10%% [7].
Because infant deaths in the first month of life are often attributable to perinatal events these were separately analyzed.
However, the difficulty is that common cancer symptoms are often attributable to benign disease.
13, 15, 16 Of note, both nausea and insomnia are often attributable to nicotine withdrawal.
A significant percentage of the thoron present in indoor environments is often attributable to building materials.
Outliers resulting from differential direct targeting were often attributable to alternative 3′ UTR isoform usage that modulated the presence of miRNA sites.
Epigenomic divergence is often attributable to genetic variation within TF motifs at orthologous enhancers, with a novel motif being most predictive of activity biases.
With film-makers, lack of productivity is often attributable to commercial contingencies or misfortunes - as in the case of Terence Davies - but it can also be the result of a time-consuming lifestyle choice.
