Skip to main content
. 2018 Mar 27;18:53. doi: 10.1186/s12903-018-0514-6

Table 4.

Nonlinear effects for age at examination and trends by exposure group estimated by smoothed terms

TOCE Untreated decay (permanent teeth)
Smoothing Terms (GAMs) edf p edf p
 Age at exam 2.94 < .001 3.85 < .001
 Visit among unexposed 2.30 < .001 1.00 0.02
 Visit among exposed 3.46 < .001 1.12 < .001

Note: increased magnitude of effective degrees of freedom (edf) indicates greater departures from linearity

TOCE total observed caries experience, GAM generalized additive models