The income of both groups was at a sufficient degree, being of 47.5% in the check team and of 60% in the invasion team. The most common cause of tracheostomy was a laryngeal tumor, which was 40% in the check team and 35% in the invasion team. The least common cause of tracheostomy was tracheal tumor, which was 5% in the check team and 7.5% in the invasion team. The results of the chi-square and chi-square experiment indicated that there was no clear variation among the demographic characteristics of both groups, and being homogenous regarding population characteristics (Table 1).