During a 5-year time horizon, the mean cost of medical treatment only was $6172, the mean cost of a trabeculectomy was $7872, and the mean cost of a tube insertion was $10 075, resulting in a difference of $1700 (95% CI, $1644-$1770) between medical treatment and trabeculectomy, $3904 (95% CI, $3858-$3953) between ...