attrition

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attrition

 [ah-trĭ´shun]
the wearing away of a substance or structure (such as the teeth) in the course of normal use.

at·tri·tion

(ă-trish'ŭn),
1. Wearing away by friction or rubbing.
2. In dentistry, physiologic loss of tooth structure caused by the abrasive character of food or by bruxism. Compare: abrasion.
[L. at-tero, pp. -tritus, to rub against, rub away]

attrition

The dropping out of a participant in a trial or study.

at·tri·tion

(ă-trish'ŭn)
1. Wearing away by friction or rubbing.
2. In dentistry, physiologic loss of tooth structure caused by normal wear inherent in the aging process, as well as by the abrasive character of food or by bruxism.
Compare: abrasion
3. The loss of participants over the course of a study, which can create bias and threaten the internal validity of the study.
[L. at-tero, pp. -tritus, to rub against, rub away]

at·tri·tion

(ă-trish'ŭn)
1. In dentistry, physiologic loss of tooth structure caused by normal wear inherent in the aging process, as well as by the abrasive character of food or by bruxism.
2. Wearing away by friction or rubbing.
[L. at-tero, pp. -tritus, to rub against, rub away]
References in periodicals archive ?
Caption: Figure 1: Intraoperatively, the triggering was found to be attributable to a partial attritional rupture of the small finger flexor digitorum profundus tendon.
"The combined operating ratio improved by just over 8 points to 95.7 percent, reflecting the significant improvement in the attritional claims ratio, coupled with the lower level of [catastrophe] activity after record industry losses in 2017," said QBE Chief Financial Officer Inder Singh.
Last year, Lloyd's reported an attritional loss ratio of 58.9% (2016: 53.3%) and an expense ratio of 39.5% (2016: 40.6%).
"It'll probably be quite attritional in the way that Ireland play and depending on the weather conditions.
Coming in to this match, both sides had been scoring freely so it was something of a surprise that this was largely an attritional battle.
Out of interest, I looked up the team that won with an attritional performance in Cardiff back in 2005, winning Arsenal's last major trophy.
Williams' second-half try - his 55th for Wales from 83 appearances - sunk Pool D rivals Samoa following an attritional battle at Waikato Stadium and maintained prospects of a quarter-final clash against Ireland.
An attritional second half lacked clear-cut opportunities but Jarvis' second penalty after 56 minutes put Connacht further ahead and they held on to win their first game of the new season.
"This is an attritional league and I think we will have to produce a few more performances like that between now and the end of the season."
JONJO O'NEILL'S Synchronised could be allowed to bid for further National glory next month after recording a battling success in an attritional John Smith's Midlands Grand National at Uttoxeter.
Military chiefs have faith in the coming operation and it would be welcome if it hastened the end of such an attritional conflict.
"It's a slow attritional pitch, but there were certainly signs of turn there in the evening session, which on day one is quite a nice situation for us to have.