1. 在Table II裡,不管DCA Group, crash severity如何分類, 有關於"ESP pertinent"的分法是由作者主觀去定義的,雖然作者有提"Defining an ‘ESP pertinent' situation, that is defining a crash situation in which ESP may have had an intervening effect, is difficult given data limitations." (p.2b),但是,在下的最低要求,是參與某種車禍的車有無配備ESP,而不是主觀定義。其它的研究報告都可以有相關資料,在此報告裡要求應不過分。
2. 對於"ESP pertinent",作者也定了個準則:"For the purpose of the current study, DCA Groups (Definition for Coding Accidents) directly related to either loss of control or those thought to be related to vehicles losing control, such as those including reference to leaving straight or curved carriageways, have been designated as ESP pertinent for the current purpose."。但是在Head-on的類別裡,ESP可有30% reduction的效果(Aga & Okada, 2003),作者未列入也無說明未列入的理由。在Table II裡,Head-on可是Fatal第一名(17.1%)的車禍類型;此外,如果Head-on也按照其它的研究加入"ESP pertinent",則"ESP pertinent"在Fatal裡的比率將占54.8%。面對影響如此大的資料,作者怎麼可以不謹慎說明?