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. 2015 Oct;24(10):1265-1278.
doi: 10.1002/pon.3899. Epub 2015 Jul 20.

Effectiveness of the extended parallel process model in promoting colorectal cancer screening

Wendy C Birmingham  1 , Man Hung  2 , Watcharaporn Boonyasiriwat  3 , Wendy Kohlmann  4 , Scott T Walters  5 , Randall W Burt  4 , Antoinette M Stroup  6 , Sandie L Edwards  4 , Marc D Schwartz  7 , Jan T Lowery  8 , Deirdre A Hill  9 , Charles L Wiggins  9 , John C Higginbotham  10 , Philip Tang  2 , Shirley D Hon  2 , Jeremy D Franklin  2 , Sally Vernon  11 , Anita Y Kinney  12
Affiliations

Effectiveness of the extended parallel process model in promoting colorectal cancer screening

Wendy C Birmingham et al. Psychooncology. 2015 Oct.

Abstract

Objective: Relatives of colorectal cancer (CRC) patients are at increased risk for the disease, yet screening rates still remain low. Guided by the Extended Parallel Process Model, we examined the impact of a personalized, remote risk communication intervention on behavioral intention and colonoscopy uptake in relatives of CRC patients, assessing the original additive model and an alternative model in which each theoretical construct contributes uniquely.

Methods: We collected intention-to-screen and medical record-verified colonoscopy information on 218 individuals who received the personalized intervention.

Results: Structural equation modeling showed poor main model fit (root mean square error of approximation (RMSEA) = 0.109; standardized root mean residual (SRMR) = 0.134; comparative fit index (CFI) = 0.797; Akaike information criterion (AIC) = 11,601; Bayesian information criterion (BIC) = 11,884). However, the alternative model (RMSEA = 0.070; SRMR = 0.105; CFI = 0.918; AIC = 11,186; BIC = 11,498) showed good fit. Cancer susceptibility (B = 0.319, p < 0.001) and colonoscopy self-efficacy (B = 0.364, p < 0.001) perceptions predicted intention to screen, which was significantly associated with colonoscopy uptake (B = 0.539, p < 0.001).

Conclusions: Our findings provide support of the utility of Extended Parallel Process Model for designing effective interventions to motivate CRC screening in persons at increased risk when individual elements of the model are considered. Copyright © 2015 John Wiley & Sons, Ltd.

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Conflict of interest statement

Conflict of Interest Statement: RWB has acted in an advisory or consultant role for Myriad Genetics. All other authors report no conflict of interest.

Figures

Figure 1.
Figure 1.
Main model - Standardized effects with p values in parentheses. RMSEA=0.109; CFI=0.797; SRMR=0.134.
Figure 2.
Figure 2.
Alternative model - Standardized effects with p values in parentheses. RMSEA=0.070; CFI=0.918; TLI=0.906; SRMR=0.105.
See this image and copyright information in PMC

References

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