Page 126 - Impact of implant retained overdenture treatment and speech, oromyofunction, social participation and quality of life.

Chapter 5
The associations between the five personality traits and self-rated quality of life and social participation across all patients are described in Table 1. Neuroticism and Extraversion (inversely) predicted pre- and post- treatment self-ratings of quality of life, whereas Agreeableness was only a predictor in the pre- treatment condition. Patients higher on Neuroticism and lower on Extraversion reported worse quality of life. Openness to experience showed to be positively associated with both frequency and diversity of social participation in the pre- and the post-treatment conditions. Agreeableness and Conscientiousness only predicted frequency of social participation in the pre-treatment condition.
Table 1. Spearman correlation between the results on Oral Health impact Profile (OHIP), frequency (Freq. Soc. Part.) and diversity (Div. Soc. Part.) of social participation and the personality traits.
Neuroticism Extraversion Openness Agreeableness Conscientiousness
*p<0.05, **p<0.001
OHIP pre n=102
0.356 ** -0.212 * -0.121 -0.334 ** -0.121
OHIP post n=88
0.233 * -0.254 * 0.032 -0.167 0.007
Freq. Soc. Part. Pre n=102
-0.129 0.187 0.277 * 0.295 * 0.288 *
Freq. Soc. Part. Post n=88
0.128 -0.044 0.232 * 0.045 -0.084
Div. Soc. Part. Pre n=102
0.006 0.181 0.293 * 0.148 0.163
Div. Soc. Part. Post n=88
0.104 0.173 0.255 * -0.055 -0.016
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Table 2 reports the results of regression analyses, regressing self-reported outcome variables obtained post-treatment on personality traits, controlling for pre-treatment values. Regressing post-treatment quality of life on personality traits, controlling for pre-treatment self-reported quality of life, showed no added explanatory value, suggesting that personality traits did not affect changes in experienced quality of life after treatment. Similar findings were obtained for regressing frequency and diversity of social relations on personality traits, taking into account their respective pre-treatment values. Comparing the two study groups pre-operatively on frequency of social participation (z=-0.875, p=0.381), diversity of social participation (z=-1.110, p=0.267) and quality of life (z=-2.412, p=0.016) revealed significantly worse results for initial quality of life in the full denture group. Postoperatively the differences on frequency of social participation (z=-1.249, p=0.212), diversity of social participation (z=-0.953, p=0.341) and quality of life (z=-0.649, p=0.516) were not significant anymore.