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Table 4 Regression Coefficients1 for General Linear Model for SF36 Physical and Mental Component Summary Scores (n = 1242)

From: Low back pain in 17 year olds has substantial impact and represents an important public health disorder: a cross-sectional study

Physical Component Summary Scores

 

β (95% CI)1

p-value

LBP group 2

No LBP

REF

 

Current Non-chronic LBP

   Males

-2.16 (-4.09,-0.23)

0.028

   Females

-1.39 (-2.85, 0.07)

0.062

Current chronic LBP

   Males

-1.28 (-2.93,0.36)

0.127

   Females

-4.60 (-5.88,-3.32)

< 0.001

Gender 3

No LBP

   Males

REF

 

   Females

-1.90 (-2.81,-0.99)

< 0.001

CNC LBP

   Males

REF

 

   Females

-1.13 (-3.36, 1.10)

0.320

CC LBP

   Males

REF

 

   Females

-5.21(-7.02,-3.40)

< 0.001

Other SP areas

No MBP or NSP

REF

 

MBP or NSP

-3.04 (-3.93,-2.16)

< 0.001

MBP and NSP

-4.56 (-5.76,-3.37)

< 0.001

Mental Component Summary Scores

 

β (95% CI)

p-value

LBP group

No LBP

REF

 

Current Non-chronic LBP

-1.75 (-3.19,-0.31)

0.017

Current chronic LBP

-3.45 (-4.73,-2.17)

< 0.001

Gender

   Males

REF

 

   Females

-3.53 (-4.47,-2.58)

< 0.001

Other SP areas

No MBP or NSP

REF

 

MBP or NSP

-2.83 (-3.93,-1.74)

< 0.001

MBP and NSP

-4.40 (-5.87,-2.93)

< 0.001

  1. 1β coefficients represent the estimated mean difference between the reference group and the contrast group, adjusted for the other variables in the model
  2. 2 Significant gender × LBP group interaction (p = 0.003), therefore effects for LBP group reported separately by each gender, and
  3. 3 Significant gender × LBP group interaction (p = 0.003), therefore effects for female gender reported separately by each category of LBP group.