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Table 7 Simple and multiple linear regression analysis to determine the independent predictors the HRV indices in the supine position

From: Factors associated with musculoskeletal symptoms and heart rate variability among cleaners – cross-sectional study

Variables

Simple regression

B (95% CI)

Multiple regression

B (95% CI)

iRR

 Quantitative work demands

−16.9 (−38.8 to 5.0)

−12.9 (−37.5 to 11.6)

 Role clarity

12.6 (−6.39 to 31.5)

7.7 (−13.2 to 28.7)

ln SDNN

 Age

−0.01 (−0.01 to 0.00)

−0.01 (−0.02 to − 0.01)

 Waist-hip ratio

−0.74 (− 1.45 to −0.02)

0.45 (−0.75 to 1.66)

 Work pace

0.02 (−0.01 to 0.06)

0.09 (−0.02 to 0.04)

ln RMSSD

 Age

−0.01 (− 0.02 to 0.00)

− 0.01 (− 0.02 to 0.00)

 Waist-hip ratio

− 1.40 (−2.39 to − 0.41)

− 0.72 (− 1.77 to 0.33)

ln LF

 Age

− 0.02 (− 0.04 to − 0.01)

−0.02 (− 0.04 to − 0.01)

 Waist-hip ratio

−1.27 (−2.71 to 0.16)

0.85 (− 1.58 to 3.28)

 Stress

0.05 (− 0.02 to 0.12)

0.01 (− 0.05 to 0.07)

ln HF

 Age

− 0.03 (− 0.04 to − 0.01)

−0.03 (− 0.04 to − 0.01)

 Waist-hip ratio

−1.27 (− 2.71 to 0.16)

−1.24 (− 3.56 to 1.06)

ln LF/HF

 Age

0.01 (0.00 to 0.02)

0.01 (0.00 to 0.02)

 Waist-hip ratio

1.33 (0.05 to 2.62)

−0.53 (− 3.01 to 1.95)

 Appreciation & recognition

0.04 (−0.02 to 0.10)

0.03 (− 0.02 to 0.09)

  1. Three individual risk factors and 19 occupational exposures (mechanical, psychosocial) were examined in unadjusted models. Only those models with an association of p < 0.20 in unadjusted models between HRV indices and determinants were included in the table
  2. iRR Interval RR, SDNN Standard deviation of all iRRs of data series in time interval, RMSSD Square root of mean square differences of successive RRs, LF Low frequency, HF High frequency, LF/HF Sympatovagal balance