Table 1.
Feature value distributions in the extended dataset used for the present analysis. For continuous variables, the average values for patients with muscle mass loss and individuals not having muscle mass loss are indicated. For categorical variables, we indicate the fraction of patients (in per cent of the total) in each sub-group, for both categories of individuals. For each variable, we have indicated also the correlation coefficient with the DEXA assessed muscle mass loss. This statistical indicator is closer to 0 if no correlation is present, and closer to +(−)1 if a positive (negative) correlation is present.
| Variable description | Variable name | Muscle mass loss | Normal muscle mass | Corr. coefficient |
|---|---|---|---|---|
| Age | RIDAGEYR | 54.515 | 48.070 | 0.144 |
| Gender | RIAGENDR | -Male 32.6% -Female 67.4% |
-Male 49.2% -Female 50.8% |
0.133 |
| Ethnic Group | RIDRETH1 | -Mexican American 14.3% -Other Hispanic 2% -Non-Hispanic White 64% -Non-Hispanic Black 3.5% -Other Race - Including Multi-Racial 16.3% |
-Mexican American 14.9% -Other Hispanic 2.9% -Non-Hispanic White 61.3% -Non-Hispanic Black 13.3% -Other Race - Including Multi-Racial 7.6% |
−0.006 |
| Citizenship Status | DMDCITZN | -US Citizen by Birth or Naturalization 88.8% -Not a Citizen of the US 11.2% |
-US Citizen by Birth or Naturalization 89.9% -Not a Citizen of the US 10.1% |
−0.015 |
| Marital Status | DMDMARTL | -Married 59.7% -Widowed 23.6% -Divorced 16.8% |
-Married 63.5% -Widowed 17.9% -Divorced 18.6% |
0.006 |
| Person Education Level | DMDHREDU | - Less Than 9th Grade 12.8% - 9-11th Grade 12.5% - High School Grad/GED or equivalent 24.2% - Some College or AA degree 25.4% - College Graduate or above 25% |
- Less Than 9th Grade 9.6% - 9-11th Grade 12.4% - High School Grad/GED or equivalent 23.8% - Some College or AA degree 27.9% - College Graduate or above 26.2% |
−0.026 |
| Height (cm) | BMXHT | 163.904 | 168.400 | −0.148 |
| Weight (kg) | BMXWT | 58.369 | 77.292 | −0.416 |
| Maximal Calf Circumference (cm) | BMXCALF | 33.596 | 38.277 | −0.457 |
| Arm Circumference (cm) | BMXARMC | 27.167 | 32.255 | −0.451 |
| Upper Leg Length (cm) | BMXLEG | 38.824 | 40.371 | −0.151 |
| Upper Arm Length (cm) | BMXARML | 35.565 | 37.375 | −0.222 |
| Maximal Thigh Circumference (cm) | BMXTHICR | 45.126 | 52.471 | −0.458 |
| Triceps Skinfold (mm) | BMXTRI | 16.263 | 18.985 | −0.098 |
| Subscapular Skinfold (mm) | BMXSUB | 15.188 | 20.847 | −0.259 |
| Systolic Blood Pressure (mmHg) | BPXSY | 126.525 | 124.219 | 0.030 |
| Differential Blood Pressure (mmHg) | BPXSY - BPXDI | 56.642 | 52.225 | 0.079 |
| Self-Reported Greatest Weight (pounds) | WHD140 | 133.679 | 259.792 | −0.015 |
| Ever being told had cancer or malignancy (1-yes, 2-no) | MCQ220 | 1–12.9% 2–87.1% |
1–7.1% 2–92.9% |
−0.093 |
| Ever being told had osteoporosis/brittle bones (1-yes, 2-no) | OSQ060 | 1–9.4% 2–90.3% |
1–3.8% 2–96.1% |
−0.044 |
| Ever being told had high blood pressure (1-yes, 2-no) | BPQ020 | 1–25.2% 2–74.8% |
1–25.9% 2–74.1% |
0.003 |
| Smoked at least 100 cigarettes in life (1-yes, 2-no) | SMQ020 | 1–51.2% 2–48.8% |
1–47.7% 2–52.3% |
−0.040 |
| Ever being told had asthma (1-yes, 2-no) | MCQ010 | 1–9.1% 2–90.9% |
1–9.7% 2–90.3% |
0.001 |
| Ever being told had arthritis (1-yes, 2-no) | MCQ160a | 1–23.1% 2–76.9% |
1–20.7% 2–79.3% |
−0.036 |
| Ever being told had coronary heart disease (1-yes, 2-no) | MCQ160c | 1–4.5% 2–95.5% |
1–2.8% 2–97.2% |
−0.044 |
| Ever being told had angina/angina pectoris (1-yes, 2-no) | MCQ160d | 1–3.7% 2–96.3% |
1–2.2% 2–97.8% |
−0.047 |
| Ever being told had heart attack (1-yes, 2-no) | MCQ160e | 1–3.9% 2–96.1% |
1–2.5% 2–97.5% |
−0.039 |
| Ever being told had a stroke (1-yes, 2-no) | MCQ160f | 1–2.9% 2–97.1% |
1–1.5% 2–98.5% |
−0.053 |
| Ever being told had emphysema (1-yes, 2-no) | MCQ160g | 1–3.0% 2–97.0% |
1–0.9% 2–99.1% |
−0.082 |
| Ever being told had chronic bronchitis (1-yes, 2-no) | MCQ160k | 1–6.3% 2–93.7% |
1–4.5% 2–95.5% |
−0.036 |
| Ever being told had any liver condition (1-yes, 2-no) | MCQ160l | 1–2.4% 2–97.6% |
1–2.6% 2–97.4% |
<0.001 |
| General health condition | HUQ010 | -Excellent 22.2% -Very good 31.7% -Good 31.3% -Fair 13.3% -Poor 1.5% |
-Excellent 24.2% -Very good 33.8% -Good 30.3% -Fair 10.8% -Poor 1.0% |
0.032 |
| Physical, mental, emotional limitations (1-yes, 2-no) | PFQ059 | 1–7.1% 2–92.9% |
1–5.8% 2–94.2% |
−0.030 |
| level of physical activity each day | PAQ180 | -sitting 22.7% -walking 57.6% -lifting light load 15.8% -heavy work 4.0% |
-sitting 20.2% -walking 52.5% -lifting light load 18.6% -heavy work 8.7% |
−0.063 |
| Vigorous activity over past 30 days (1-yes, 2-no, 3-unable to do activity) | PAD200 | 1–23.5% 2–75.1% 3–1.4% |
1–38.1% 2–60.8% 3–1.1% |
0.110 |
| Moderate activity over past 30 days (1-yes, 2-no, 3-unable to do activity) | PAD320 | 1–52.4% 2–46.7% 3–1.0% |
1–53.5% 2–45.9% 3–0.6% |
0.012 |
| Muscle strengthening activities over the past 30 days (1-yes, 2-no, 3-unable to do activity) | PAD440 | 1–22.1% 2–77.1% 3–0.9% |
1–30.7% 2–68.5% 3–0.8% |
0.072 |
| Daily hours of TV, video or computer use (0-less than 1 h, 1-one hour, 2- 2 h, 3-three hours, 4-four hours, 5-five or more hours, 6-none) | PAQ480 | 0–10.4% 1–18.3% 2–26.8% 3–19.5% 4–11.1% 5–11.8% 6–1.3% |
0–13.1% 1–16.3% 2–27.4% 3–18.9% 4–11.0% 5–10.7% 6–1.2% |
0.017 |