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Table 3 Health-related quality of life assessed using RAND-36 at baseline, one month and 12 months according to treatment group and between group comparisons of difference from baseline to one month and 12 months

From: Efficacy of zoledronic acid for chronic low back pain associated with Modic changes in magnetic resonance imaging

 

Mean (SD) original values

Mean (SD) change

Unadjusted analyses

Adjusted analyses

ZA

Placebo

ZA

Placebo

Difference

P

Difference

P*

 

n = 20

n = 20

  

(95% CI)

 

(95% CI)

 

Total RAND-36

        

  Baseline

50 (8)

50 (7)

      

  1 month

51 (8)

49 (8)

0.6 (6.4)

−0.6 (5.0)

1.2 (−3 to 5)

0.530

1.3 (−3 to 5)

0.477

  12 months

51 (8)

49 (9)

1.0 (8.7)

−1.0 (5.9)

2.1 (−3 to 7)

0.378

2.2 (−2 to 7)

0.314

Physical component

        

  Baseline

52 (8)

48 (8)

      

  1 month

52 (9)

48 (8)

0.1 (8.6)

−0.1 (5.5)

0.3 (−4 to 5)

0.897

1.3 (−3 to 6)

0.554

  12 months

52 (8)

48 (2)

0.3 (10)

−0.3 (6.5)

0.7 (−5 to 6)

0.808

2.1 (−3 to 7)

0.405

Mental component

        

  Baseline

49 (9)

51 (8)

      

  1 month

50 (9)

50 (9)

1.0 (6.1)

−1.0 (5.6)

2.0 (−2 to 6)

0.286

1.6 (−2 to 5)

0.396

  12 months

51 (9)

49 (9)

1.8 (9.0)

−1.8 (6.7)

3.5 (−2 to 9)

0.167

2.7 (−2 to 7)

0.261

  1. SD = standard deviation, CI = confidence interval, ZA = zoledronic acid.
  2. *ANCOVA: Difference between follow-up and baseline, treatment effect adjusted for baseline value.