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Table 3 Comparison of characteristics between participants with and without low back pain among women

From: Association between serum lipids and low back pain among a middle-aged Japanese population: a large-scale cross-sectional study

  Low back pain (+) (n = 1889) Low back pain (−) (n = 86,872) p valuea
Age (years)
 40–49 626 33.1 39,403 45.4 <  0.001
 50–59 863 45.7 34,049 39.2
 60–64 400 21.2 13,420 15.4
Height (cm) 156.9 (6.5) 157.2 (6.3) 0.062
Weight (kg) 57.7 (10.8) 55.7 (10.3) <  0.001
Body mass index (kg/m2)
 <  18.5 138 7.3 9474 10.9 <  0.001
 18.5–24.9 1200 63.5 58,904 67.8
 ≥ 25 551 29.2 18,494 21.3
Physical activity (min/day)
 ≥ 60 643 34.0 26,810 30.9 0.003
 <  60 1246 66.0 60,062 69.1
Smoking status
 None 1327 70.2 64,220 73.9 0.001
 Former 149 7.9 5735 6.6
 Current 413 21.9 16,917 19.5
Alcohol intake
 None 1099 58.2 49,307 56.7 0.250
 Sometimes 521 27.6 24,037 27.7
 Everyday 269 14.2 13,528 15.6
LDL-C (mg/dL)
 Normal (<  140) 1278 67.7 62,129 71.5 <  0.001
 High (≥ 140) 611 32.3 24,743 28.5
HDL-C (mg/dL)
 Normal (≥ 40) 1828 96.8 85,092 98.0 <  0.001
 Low (<  40) 61 3.3 1780 2.0
LDL-C/HDL-C ratio
 Low (<  2.5) 1398 74.0 69,350 79.8 <  0.001
 High (≥ 2.5) 491 26.0 17,522 20.2
  1. Data are presented as number and percentage, or mean (standard deviation)
  2. LDL-C: Low-density lipoprotein-cholesterol, HDL-C: High-density lipoprotein-cholesterol
  3. a Person chi-square test or unpaid t test