Table 3.

Predicting whether an SSE was performed in the past two months using hierarchical logistic regression.

	b	OR	OR 95% CI	Wald	p
Demographics
Age	−0.010	0.990	0.97 to 1.01	0.920	0.337
Education	−0.106	0.899	0.69 to 1.17	0.631	0.427
Marital status	0.104	1.110	0.83 to 1.49	0.479	0.489
Sex	0.012	1.012	0.77 to 1.34	0.007	0.934
			Step 1$\mathrm{\Delta }{R}^2=$0.053**
Medical factors
Months since surgery	0.027	1.027	0.98 to 1.08	1.246	0.264
Disease stage	−0.041	0.960	0.70 to 1.31	0.067	0.796
			Step 2$\mathrm{\Delta }{R}^2=$0.001
Skin cancer risk factors
Number of risk factors	−0.060	0.942	0.81 to 1.09	0.657	0.418
Sunburn in past year	0.015	1.015	0.59 to 1.75	0.003	0.957
			Step 3$\mathrm{\Delta }{R}^2=$0.001
Melanoma knowledge & attitudes
Knowledge	0.103	1.108	0.99 to 1.24	3.065	0.080
Severity	0.028	1.029	0.71 to 1.49	0.022	0.882
Controllability	0.167	1.181	0.83 to 1.67	0.879	0.349
Risk of recurrence	0.473**	1.605	1.14 to 2.27	7.163	0.007
			Step 4$R^2=$0.075**
Psychological
Distress about melanoma	−0.068	0.935	0.82 to 1.07	0.950	0.330
Worry about recurrence	0.318*	1.375	1.04 to 1.82	4.890	0.027
			Step 5$\mathrm{\Delta }{R}^2=$0.016
Social influence
Physician influence	0.429**	1.536	1.15 to 2.05	8.393	0.004
Family and friend influence	−0.043	0.958	0.76 to 1.22	0.128	0.721
			Step 6$\mathrm{\Delta }{R}^2=$0.085**
SSE knowledge & attitudes
Knowledge	0.000	1.000	0.86 to 1.17	0.000	1.000
Benefits	−0.022	0.978	0.67 to 1.43	0.013	0.910
Barriers	−0.485*	0.616	0.40 to 0.94	4.974	0.026
Planning	0.262*	1.299	1.04 to 1.62	5.457	0.019
Self-efficacy	0.532**	1.703	1.17 to 2.48	7.691	0.006
			Step 7$\mathrm{\Delta }{R}^2=$0.088**

Note. *p < . 05, **p < .01. Coefficients are from the full model that included all of the predictors. Total Nagelkerke R² for the model is 0.318, χ²(21) = 114.61, p < .001. Education is coded 1 = Bachelor’s degree or greater education, −1 = less than a Bachelor’s degree. Marital status is coded 1 = partnered, −1 = not partnered. Sex is coded 1 = male, −1 = female. Change in R² is based on Nagelkerke R². SSE = skin self-examination.