Skip to main content
. Author manuscript; available in PMC: 2008 Jun 20.
Published in final edited form as: Med Sci Sports Exerc. 2005 Nov;37(11 Suppl):S555–S562. doi: 10.1249/01.mss.0000185651.59486.4e

TABLE 4.

Root mean square difference (RMSD), mean signed difference (MSD), and correlation between true and imputed MET-minutes of MVPAAU.

Artificially Generated Missing Data (MCAR)
Artificially Generated Missing Data (NMAR)
EM-Imputed
Mean across Multiple (5) Imputations
EM-Imputed
Mean across Multiple (5) Imputations
Day of the Week RMSD (MSD) Spearman Correlation RMSD (MSD) Spearman Correlation RMSD (MSD) Spearman Correlation RMSD (MSD) Spearman Correlation
Mon 101 (−26) 0.63 108 (−32) 0.64 64 (14) 0.54 67 (15) 0.41
Tues 92 (−4) 0.72 108 (7) 0.80 65 (30) 0.33 63 (13) 0.55
Weds 76 (11) 0.75 80 (8) 0.87 65 (39) 0.61 87 (44) 0.37
Thurs 129 (−6) 0.21 133 (5) 0.34 60 (35) 0.56 62 (12) 0.44
Fri 119 (19) 0.53 119 (26) 0.42 89 (52) 0.36 87 (45) 0.32
Sat 139 (−8) 0.29 156 (−9) 0.13 76 (26) 0.21 98 (25) 0.09
Sun 92 (3) 0.45 92 (5) 0.40 60 (25) 0.29 69 (23) 0.32
Weekday average 105 (−5.9) 0.58 111 (−3.7) 0.60 69 (30) 0.48 72 (24) 0.41
Weekend average 114 (−2.3) 0.38 122 (−1.1) 0.27 68 (25) 0.25 83 (24) 0.20
Daily averagea 109 (−4.4) 0.49 116 (−2.6) 0.46 69 (28) 0.38 77 (24) 0.32
Weekdays
 6–9 a.m. 41 (−8) 0.59 42 (−8) 0.49 20 (14) 0.37 21 (10) 0.16
 9 a.m.–2 p.m. 31 (3) 0.42 33 (6) 0.38 28 (10) 0.38 32 (10) 0.28
 2–5 p.m. 44 (5) 0.38 46 (6) 0.26 30 (17) 0.34 41 (16) 0.13
 5 p.m.–8 p.m. 81 (−4) 0.09 80 (−3) 0.21 25 (16) 0.00 34 s(10) 0.19
 8 p.m.–12 a.m. 26 (6) 0.44 28 (9) 0.11 20 (8) 0.27 29 (2) −0.04
Weekday average 44 (0.3) 0.37 46 (2.1) 0.29 25 (13) 0.27 31 (9.4) 0.14
Weekend days
 6–11 a.m. 31 (−2) 0.12 32 (0) 0.11 12 (10) 0.12 23 (12) 0.06
 11 a.m.–2 p.m. 36 (1) 0.05 36 (0) 0.05 20 (10) 0.24 26 (−1) −0.08
 2–5 p.m. 38 (3) 0.22 41 (4) 0.17 26 (12) 0.33 34 (4) 0.15
 5–8 p.m. 39 (−4) 0.23 45 (−1) −0.11 24 (18) 0.09 34 (10) 0.10
 8 p.m.–12 a.m. 36 (0) 0.23 37 (3) −0.05 22 (11) 0.28 41 (15) 0.15
Weekend average 36 (−0.5) 0.17 38 (1.1) 0.12 21 (12) 0.21 32 (8.1) 0.08
Daily averagea 42 (0.1) 0.32 44 (1.8) 0.24 23 (13) 0.25 31 (9.0) 0.12