Table 4.

Result of the Prediction Model of Unmitigated Pain Using the Linear Regression Model

Variable	Estimate	Std Err	T	p
Intercept	7.646	1.228	6.228	0.000***
HgbSC	−1.566	0.890	−1.761	0.088
SB+Thal or SOArab	−5.479	2.332	−2.349	0.025*
Age at baseline−18	0.001	0.034	0.290	0.773
Hydroxyurea user	−1.205	0.839	−1.437	0.160
Nonopioid user	−2.523	0.842	−2.995	0.005**
SB+Thal or SOArab × (age at baseline −18)	0.241	0.010	2.419	0.021*

^*, ^**, and ^*** respectively denote levels .05, .01, and .001 of statistical significance.