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Table 2 Comparison of anthropometric and BMD differences in those with or without persistent pain at 24-28 months

From: Persistence of back pain symptoms after pregnancy and bone mineral density changes as measured by quantitative ultrasound - a two year longitudinal follow up study

  PBP group
(n = 24)
NBP group
(n = 36)
p-value; MD
(95% CI)
Age (years) 33.3 (3.14) 32.2 (2.82) 0.22; 0.95
(-0.59 to 2.51)
Height (cm) 157 (5.2) 156 (6.2) 0.67; 0.66
(-2.43 to 3.75)
Early pregnancy weight (kg) 54.5 (6.83) 57 (7.66) 0.21; -2.44
(-6.32 to 1.42)
Early pregnancy BMI (kg/m2) 22 (2.55) 23.2 (2.96) 0.11; -1.19
(-2.67 to 0.28)
Early pregnancy body fat percentage 28.7 (4.27) 29.8 (5.01) 0.66; -0.30
(-3.53 to 1.5)
Early pregnancy BMD (g/cm2) 0.686 (0.135) 0.605 (0.124) 0.021; - 0.081
(0.001 to 0.12)
Pregnancy weight gain (kg) 9.55 (2.35) 9.43 (3.37) 0.88; 0.11
(-1.47 to 1.70)
Pregnancy body fat accumulation (%) 7.75 (1.89) 8.05 (3.02) 0.66; -0.30
(-1.69 to 1.08)
Pregnancy BMD loss (g/cm2) 0.0472(0.018) 0.0306(0.033) 0.034; 0.0165
(-0.031 to -0.013)
Lactation duration in index pregnancy (weeks) 8.8 (4.5) 8.1 (3.6) 0.50; 0.72
(-1.4 to 2.85)
Weight change at 2 yrs post delivery (kg) 3.68 (1.84) 2.86 (1.02) 0.031; 0.82
(0.076 to 1.57)
Body fat change 2 yrs post delivery (%) 2.33 (1.34) 2.68 (1.85) 0.42; -0.35
(-1.23 to 0.53)
BMD change 2 yrs post delivery (g/cm2) -0.0257 (0.029) -0.0007 (0.028) 0.023; -0.017
(-0.033 to-0.0025)
  1. MD = mean difference
  2. CI = confidence interval