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Table 2 Association of baseline and 10-year changes in mean total activity and activity categories with changes in MCS and PCS (n = 894)

From: Bidirectional associations of accelerometer-derived physical activity and stationary behavior with self-reported mental and physical health during midlife

 

MCS (pts)

PCS (pts)

Model 1

std. β (95% CI)

Model 2 (+BMI)

std. β (95% CI)

Model 1

std. β (95% CI)

Model 2 (+BMI)

std. β (95% CI)

Mean Total Activity

 Baseline cpm

0.30 (− 0.31, 0.91)

0.43 (− 0.19, 1.06)

0.75 (0.23, 1.26)

0.53 (0.01, 1.05)

 10-year change in cpm

0.37 (− 0.23, 0.98)

0.46 (− 0.15, 1.07)

1.12 (0.61, 1.62)

0.97 (0.47, 1.48)

Activity Categories

 SB

  Baseline & 10-year change

ref.

ref.

ref.

ref.

 LPA

  Baseline

−0.25 (− 0.89, 0.39)

− 0.20 (− 0.84, 0.44)

0.07 (− 0.46, 0.61)

−0.00 (− 0.53, 0.52)

  10-year change

0.16 (− 0.45, 0.77)

0.22 (− 0.39, 0.83)

0.10 (− 0.41, 0.61)

0.01 (− 0.49, 0.51)

 MVPA

  Baseline

0.49 (− 0.13, 1.12)

0.60 (− 0.03, 1.22)

0.76 (0.24, 1.28)

0.60 (0.08, 1.12)

  10-year change

0.32 (−0.28, 0.91)

0.38 (−0.21, 0.97)

1.17 (0.68, 1.66)

1.07 (0.58, 1.56)

  1. Statistically significant results are bolded
  2. Standardized β are interpreted as the difference in MCS or PCS pts. per 1 SD difference in: total activity SD = 136 cpm; 10-year change in total activity SD = 139 cpm; LPA SD = 85 min per day; 10-year change in LPA SD = 88 min per day; MVPA SD = 23 min per day; 10-year change in MVPA SD = 23 min per day
  3. Model 1 includes LPA and MVPA in the activity category analysis; both analyses also adjust for baseline value of MCS or PCS, follow-up time, age, race, gender, education, smoking, center, and average accelerometer wear time
  4. Model 2 adds adjustment for baseline and 10-year change in BMI
  5. Abbreviations: BMI body mass index, cpm counts per minute, LPA light-intensity physical activity, MCS mental component score, MVPA moderate-to-vigorous intensity physical activity, PCS physical component score, pts. points, ref. reference category, SB stationary behavior