. 2011 Mar;36(3):139–144.

Table 3.

Univariate Analysis

Low Back Pain, Mean (SD), Tablets^*	Oxycodone CR		Oxymorphone ER		Difference in DACON (Tablets/Day)
Low Back Pain, Mean (SD), Tablets^*	n	*Mean (SD)*	n	*Mean (SD)*	Difference in DACON (Tablets/Day)
Highest strengths^†	688	3.9 (2.4)	91	2.9 (1.3)	1.0
Lower strengths^†	3,335	3.1 (1.6)	283	2.6 (1.2)	0.5
Overall^†	4,023	3.2 (1.8)	374	2.7 (1.2)	0.5

Highest tablet strength: oxycodone CR = 80 mg and oxymorphone ER = 40 mg; lower tablet strengths: oxycodone CR < 80 mg and oxymorphone ER < 40 mg.

† t-tests established statistically significant differences in daily average consumption (DACON) between oxycodone CR and oxymorphone ER across all categories (P < 0.01).

CR = controlled release; DACON = daily average consumption; ER = extended release; SD = standard deviation.