But the changes made to the Taser report went to the core findings by the board, which over the last few years has been battered by internal strife and by questions about its independence.

A spokesman for the mayor, who appoints the board’s leader and its members, called the process that led to the revisions “collaborative.”

Taser complaints have represented a small fraction of the complaints received by the review board, in part because Taser use was restricted to a small number of officers. Over the period studied in the report, from 2014 through 2015, the board’s investigators conducted full investigations of 51 of the 153 complaints filed and substantiated only three of them. (The 102 other complaints from that period were closed without a full investigation, often because the complainant was uncooperative, could not be located or withdrew his or her allegation.)

But the devices, seen as a useful alternative to deadly force in some situations, have become an increasingly familiar part of policing across the country. The New York Police Department moved last year to expand their use, despite a troubled history with such devices.

The Taser study coincided with a period of turmoil at the review board, whose data on declining complaints about officers has been an important indicator for the Police Department and Mayor Bill de Blasio to show improved police conduct and better relations between officers and the public.