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Randomised controlled trial of physiotherapy compared with advice for low back pain

BMJ 2004; 329 doi: https://doi.org/10.1136/bmj.38216.868808.7C (Published 23 September 2004) Cite this as: BMJ 2004;329:708

Data supplement


  •  

    Table 1

    Table 2


    Table 1. [As supplied by authors] Mean (SD) change in health scores from baseline for the two study groups at 2, 6 and 12 months for subjects with valid data at each individual assessment

     

    Therapy group

    (N=144)

    Advice only group

    (N=142)

    Mean difference

    (95% CI)

    P-value:

    t-test

    (ANCOVAa)

     

    Mean (SD)

    Change

    N Effect

    size

    Mean (SD) change

    N Effect

    size

    		  

    Oswestry Disability Index (%)

    		      

    2 months

    -3.09 (10.02)

    121 0.28

    -1.67 (10.40)

    113 0.14

    -1.42 (-4.05 to 1.21)

    .29 (.19)

    6 months

    -3.27 (11.93)

    108 0.30

    -3.42 (10.80)

    96 0.30

    0.15 (-3.01 to 3.31)

    .93 (.82)

    12 months

    -3.75 (11.50)

    101 0.35

    -3.70 (11.05)

    97 0.34

    -0.05 (-3.22 to 3.11)

    .97 (.91)

    Roland and Morris

    		      

    2 months

    -1.31 (4.26)

    124 0.31

    -0.71 (3.80)

    112 0.16

    -0.59 (-1.63 to 0.45)

    .26 (.25)

    6 months

    -1.18 (4.75)

    110 0.28

    -1.28 (4.58)

    95 0.29

    0.10 (-1.19 to 1.39)

    .88 (.69)

    12 months

    -1.23 (4.70)

    106 0.30

    -1.56 (4.23)

    97 0.36

    0.33 (-0.91 to 1.57)

    .60 (.90)

    SF-36 Physical component

    		      

    2 months

    0.43 ( 9.26)

    116 0.04

    -1.38 ( 9.33)

    108 0.12

    1.81 (-0.64 to 4.26)

    .15 (.19)

    6 months

    0.01 ( 9.84)

    105 0.00

    -0.46( 8.92)

    91 0.04

    0.48 (-2.19 to 3.14)

    .73 (.98)

    12 months

    0.59 (10.33)

    90 0.06

    -1.15( 10.21)

    87 0.11

    1.74 (-1.31 to 4.78)

    .26 (.37)

    SF-36 Mental component

    		      

    2 months

    0.86 ( 8.24)

    116 0.09

    -1.40 (8.78)

    108 0.13

    2.26 ( 0.02 to 4.50)

    .048 (.038)

    6 months

    0.13 ( 8.35)

    105 0.01

    -0.35 (7.88)

    91 0.03

    0.48 (-1.82 to 2.78)

    .68 (.57)

    12 months

    0.46 ( 9.14)

    90 0.04

    -1.22 (8.88)

    87 0.12

    1.68 (-0.99 to 4.36)

    .22 (.14)

    a effect of group adjusting for baseline score, age, gender, smoking status, and time since first episode of back pain

     

     

     

    Table 2 [As supplied by authors] Patient perceived benefits of treatment at 2, 6 and 12 months post randomisation for subjects with valid data at each individual assessment

     

    Patient perceived benefit

    Therapy group (n=144)

    Advice only group

    (n=142)

    RR of perceived benefit (95% CI)

    P-value: X2 (logistic regressiona)

    2 months

    		    

    Perceived benefit

    93 (76.9%)

    64 (59.8%)

    1.29 (1.07 to 1.54)

    .009 (.002)

    No perceived benefit

    28 (23.1%)

    43 (40.2%)

    		  
         

    6 months

    		    

    Perceived benefit

    70 (64.8%)

    45 (51.7%)

    1.25 (0.98 to 1.60)

    .089 (.014)

    No perceived benefit

    38 (35.2%)

    42 (48.3%)

    		  
         
         

    Patient perceived benefit? (0-10 scale)

    		  

    Mean difference (95% CI)

    P-value:

    t-test (ANCOVAa)

    2 months

    5.42 (2.84)

    n=119

    3.66 (2.78)

    n=103

    1.76 (1.01 to 2.51)

    .001 (<.001)

    6 months

    4.74 (3.24)

    n=107

    3.81 (3.00)

    n=85

    0.93 (0.03 to 1.83)

    .043 ( .013)

    12 months

    5.15 (3.06)

    n=100

    4.28 (2.92)

    n=94

    0.87 (0.02 to 1.72)

    .044 ( .041)

    a effect of group adjusting for age, gender, smoking status, and time since first episode of back pain.


     

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