He reported that up to 88% of his patients improved with insulin shock therapy, but most other people reported more mixed results and it was eventually shown that patient selection had been biased and that it didn't really have any specific benefits and had many risks, adverse effects and fatalities.
Han opgav selv, at op til 88% af hans patienter fik forbedret tilstand ved insulin-chokterapi, mens de fleste andre læger, som siden prøvede hans metode, rapporterede blandede resultater, og det blev til sidst godtgjort, at hans patientudvælgelse var selektiv, og at der ikke var nogen særlige fordele, hvorimod metoden havde mange risici, bivirkninger og dødsfald.