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Muscular Strength Exam
File Frequencies
(MSX.XPT)

Table of Contents
 bullet MSAEXLEN: length of a MEC exam (sec)
bullet MSAEXSTS: Status of a MEC exam
bullet MSAEXCMT: Comment code for an exam
bullet MSDEXCLU: Exclusion criteria for muscle strength
bullet MSXWTIME: Time to complete 20 ft walk (seconds)
bullet MSXWPAIN: Pain reported on walking:
bullet MSAWDEV: Type of device used:
bullet MSDPTIME: Time to peak force in seconds
bullet MSDPFANG: Angle of peak force (degrees)
bullet MSXARML: Arm length cm
bullet MSXGRAV: Gravity Correction in Lb
bullet MSDPFVEL: Peak force velocity degree/seconds
bullet MSDPF: Peak force (Newtons)
bullet MSDNTR: Number of trials
bullet MSDAPF: Average peak force (Newtons)
bullet MSDPFTR: The selected peak force trial

Analysis Variable : MSAEXLEN length of
a MEC exam (sec)
N N Miss Minimum Maximum
2156 0 0 2884

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Status of a MEC exam
MSAEXSTS Frequency Percent Cumulative
Frequency		 Cumulative
Percent
1: Complete 1481 68.69 1481 68.69
2: Partial 461 21.38 1942 90.07
3: Not done 214 9.93 2156 100.00

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Comment code for an exam
MSAEXCMT Frequency Percent Cumulative
Frequency		 Cumulative
Percent
Missing 1708 79.22 1708 79.22
0: None 1 0.05 1709 79.27
1: Safety exclusion 135 6.26 1844 85.53
2: SP refusal 26 1.21 1870 86.73
3: No time 9 0.42 1879 87.15
4: Physical limitation 126 5.84 2005 93.00
5: Communication problem 5 0.23 2010 93.23
6: Equipment failure 36 1.67 2046 94.90
7: SP ill/emergency 11 0.51 2057 95.41
14: Interrupted 1 0.05 2058 95.45
56: Came late/left early 80 3.71 2138 99.17
99: Other, specify 18 0.83 2156 100.00

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Exclusion criteria for muscle strength
MSDEXCLU Frequency Percent Cumulative
Frequency		 Cumulative
Percent
Missing 1899 88.08 1899 88.08
1: Chest or abdomen surgery in the past three weeks 10 0.46 1909 88.54
2: Myocardial infarction (or "heart attack") in the past six weeks 3 0.14 1912 88.68
3: Told by doctor had an aneurysm in the brain or had a stroke 99 4.59 2011 93.27
4: Have severe neck or back pain today 88 4.08 2099 97.36
5: Difficulty in bending or straightening right knee 25 1.16 2124 98.52
6: Had right knee or right hip replacement 32 1.48 2156 100.00

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Analysis Variable : MSXWTIME Time to
complete 20 ft walk (seconds)
N N Miss Minimum Maximum
1933 223 1 61.2

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Pain reported on walking:
MSXWPAIN Frequency Percent Cumulative
Frequency		 Cumulative
Percent
Missing 212 9.83 212 9.83
1: Yes 11 0.51 223 10.34
2: No 1933 89.66 2156 100.00

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Type of device used:
MSAWDEV Frequency Percent Cumulative
Frequency		 Cumulative
Percent
Missing 211 9.79 211 9.79
1: None 1878 87.11 2089 96.89
2: Cane 52 2.41 2141 99.30
3: Walker 9 0.42 2150 99.72
4: Other 6 0.28 2156 100.00

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Analysis Variable : MSDPTIME Time to
peak force in seconds
N N Miss Minimum Maximum
1500 656 0 9.2

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Analysis Variable : MSDPFANG Angle of
peak force (degrees)
N N Miss Minimum Maximum
1500 656 89.5 150.5

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Analysis Variable : MSXARML Arm length cm
N N Miss Minimum Maximum
1500 656 2 90

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Analysis Variable : MSXGRAV Gravity Correction
in Lb
N N Miss Minimum Maximum
1480 676 0 46

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Analysis Variable : MSDPFVEL Peak force
velocity degree/seconds
N N Miss Minimum Maximum
1500 656 -5.25 65.5

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Analysis Variable : MSDPF Peak force
(Newtons)
N N Miss Minimum Maximum
1500 656 77 825

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Number of trials
MSDNTR Frequency Percent Cumulative
Frequency		 Cumulative
Percent
Missing 656 30.43 656 30.43
1 9 0.42 665 30.84
2 8 0.37 673 31.22
3 6 0.28 679 31.49
4 9 0.42 688 31.91
5 38 1.76 726 33.67
6 1430 66.33 2156 100.00

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Analysis Variable : MSDAPF Average peak
force (Newtons)
N N Miss Minimum Maximum
1498 658 69.3 696.8

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The selected peak force trial
MSDPFTR Frequency Percent Cumulative
Frequency		 Cumulative
Percent
Missing 656 30.43 656 30.43
1 14 0.65 670 31.08
2 6 0.28 676 31.35
3 3 0.14 679 31.49
4 458 21.24 1137 52.74
5 359 16.65 1496 69.39
6 660 30.61 2156 100.00

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This page last reviewed January 11, 2007

H H S Health and Human Services logo and link
U.S. DEPARTMENT OF HEALTH AND HUMAN SERVICES
Centers for Disease Control and Prevention
National Center for Health Statistics
Hyattsville, MD
20782

 1-800-232-4636