Positive and negative affect and oral health-related quality of life

Table 7 Summary of R-squared values from regression models of OHIP subscale scores

	Model 1	Model 2	Model 3	Model 4
OHIP subscale used as dependent variable
Functional limitation	0.1494	^(a)0.1634	^(b)0.1793	^(c)0.1815
Physical pain	0.1366	^(a)0.1690	^(b)0.1778	^{(c, d)}0.1879
Psychological discomfort	0.1539	^(a)0.1885	^(b)0.2080	^{(c, d)}0.2166
Physical disability	0.1747	^(a)0.1977	^(b)0.2166	^{(c, d)}0.2212
Psychological disability	0.1704	^(a)0.2082	^(b)0.2396	^{(c, d)}0.2472
Social disability	0.0856	^(a)0.1139	^(b)0.1359	^{(c, d)}0.1419
Handicap	0.1264	^(a)0.1637	^(b)0.1756	^{(c, d)}0.1868

Note: model 1 independent variables include number of teeth, card holder status, relief of pain visit, model 2 includes number of teeth, card holder status, relief of pain visit plus positive affect, model 3 includes number of teeth, card holder status, relief of pain visit plus negative affect, and model 4 includes number of teeth, card holder status, relief of pain visit plus both positive affect and negative affect.
(a): model 2 vs model 1 (P < 0.05)
(b): model 3 vs model 1 (P < 0.05)
(c): model 4 vs model 2 (P < 0.05)
(d): model 4 vs model 3 (P < 0.05)

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