Table 4.

Pairwise comparisons of slopes by dosage frequency group^a.

Contrast			Estimate (SE)		t test (dfb)		P valuec
1 day per week
	2 days per week	−1.13×10−3 (4.77×10−4)		−2.37 (infinity)		.12
	3 days per week	−2.82×10−3 (5.42×10−4)		−5.21 (infinity)		<.001 d
	4 days per week	−4.73×10−3 (6.05×10−4)		−7.82 (infinity)		<.001
	5 days per week	−5.03×10−3 (6.17×10−4)		−8.14 (infinity)		<.001
2 days per week
	3 days per week	−1.69×10−3 (4.46×10−4)		−3.79 (infinity)		.001
	4 days per week	−3.60×10−3 (5.30×10−4)		−6.79 (infinity)		<.001
	5 days per week	−3.90×10−3 (5.49×10−4)		−7.10 (infinity)		<.001
3 days per week
	4 days per week	−1.91×10−3 (5.16×10−4)		−3.70 (infinity)		.002
	5 days per week	−2.20×10−3 (5.56×10−4)		−3.97 (infinity)		.001
4 days per week
	5 days per week	−2.94×10−4 (5.56×10−4)		−0.52 (infinity)		.99

^aResults are averaged over the levels of sex and chronicity.

^bDegrees-of-freedom method: asymptotic.

^cP value adjustment: Tukey method for comparing a family of 5 estimates.

^dItalicized text indicates significant contrast, P<.05.