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Table 4 Association between protoporphyrin IX and muscle quality index

From: Association between protoporphyrin IX and sarcopenia: a cross sectional study

  Muscle quality index
  Average peak force (Newtons) Skeletal muscle index Gait speed
Models a βb
(95% CI)
P
Value
βb
(95% CI)
P
Value
βb
(95% CI)
P
Value
Model a 1 −69.413 (−88.981, −49.846) < 0.001 − 0.634 (− 0.898, − 0.370) < 0.001 0.160 (0.085, 0.235) < 0.001
Model a 2 −15.155 (−31.471, 1.161) 0.069 0.162 (− 0.052, 0.376) 0.137 0.080 (0.006, 0.154) 0.034
Model a 3 −11.848 (−28.203, 4.507) 0.155 − 0.186 (− 0.309, − 0.064) 0.003 0.048 (− 0.025, 0.121) 0.200
  1. BMI body mass index; CI confidence interval
  2. a Adjusted covariates
  3. Model 1 = Unadjusted
  4. Model 2 = Model 1 + age, sex, race/ethnicity
  5. Model 3 = Model 2 + BMI, comorbidity, smoking, education level, hemoglobin
  6. b β coefficients were interpreted as change of protoporphyrin IX for each increase or decrease in muscle quality index