Homework SourseFrom Table 4 age sex and BMI accounted for the largest amoun
From Table 4, age, sex, and BMI accounted for the largest amount of variability for which variable?
Table 4
caption a7
Variables predicting PCS, physical function, MCS, vitality, and psychological well-being of HRQoL (multiple regression of significant predictors, in blocks)
Variables
Model 1
Model 2
Model 3
B
SE B
B
SE B
B
SE B
PCS
Age
0.24
0.17
0.08
0.68
0.17
0.23***
0.67
0.17
0.22***
Sex
3.16
2.56
0.07
2.38
2.37
0.05
2.16
2.36
0.05
BMI
1.61
0.22
0.41***
1.59
0.21
0.41***
PA
0.09
0.04
0.11*
R2
0.01
0.16
0.17
F for change in R2
1.56
55.95***
4.15***
Physical function
Age
0.32
0.16
0.10
0.83
0.16
0.27***
0.83
0.16
0.27***
Sex
4.33
2.45
0.09
3.05
2.20
0.07
2.72
2.18
0.06
BMI
1.85
0.80
0.48***
1.85
0.20
0.47***
PA
0.10
0.04
0.13**
R2
0.02
0.21
0.23
F for change in R2
3.10*
87.73***
7.60***
MCS
Age
0.02
0.15
0.01
0.21
0.16
0.08
0.21
0.16
0.08
Sex
4.91
2.34
0.12*
4.61
2.21
0.11*
4.06
2.24
0.10
BMI
0.84
0.21
0.24**
0.81
0.20
0.23**
PA
0.13
0.04
0.20***
R2
0.02
0.07
0.10
F for change in R2
2.29
16.71***
13.20***
Vitality
Age
0.26
0.14
0.11
0.03
0.14
0.01
0.04
0.14
0.02
Sex
2.92
2.02
0.08
2.35
1.96
0.06
1.84
1.91
0.05
BMI
0.84
0.18
0.27***
0.81
0.17
0.24***
PA
0.15
0.03
0.24***
R2
0.02
0.08
0.14
F for change in R2
3.34*
22.28***
22.03***
Psychological well-being
Age
0.23
0.14
0.09
0.11
0.14
0.05
0.12
0.14
0.05
Sex
2.91
2.03
0.08
2.70
2.02
0.07
2.30
2.00
0.06
BMI
0.41
0.18
0.13*
0.39
0.18
0.13*
PA
0.11
0.03
0.18**
R2
0.02
0.03
0.06
F for change in R2
2.71
4.98*
11.32*
Notes:
*P < 0.05 level;
**P < 0.01 level;
***P < 0.001 level (2-tailed).
Abbreviations: BMI, body mass index; HRQoL, health-related quality of life; MCS, mental composite summary; PA, physical activity; PCS, physical composite summary.
| Variables | Model 1 | Model 2 | Model 3 | ||||||
| B | SE B |
| B | SE B |
| B | SE B |
| |
| PCS | |||||||||
| Age | 0.24 | 0.17 | 0.08 | 0.68 | 0.17 | 0.23*** | 0.67 | 0.17 | 0.22*** |
| Sex | 3.16 | 2.56 | 0.07 | 2.38 | 2.37 | 0.05 | 2.16 | 2.36 | 0.05 |
| BMI | 1.61 | 0.22 | 0.41*** | 1.59 | 0.21 | 0.41*** | |||
| PA | 0.09 | 0.04 | 0.11* | ||||||
| R2 | 0.01 | 0.16 | 0.17 | ||||||
| F for change in R2 | 1.56 | 55.95*** | 4.15*** | ||||||
| Physical function | |||||||||
| Age | 0.32 | 0.16 | 0.10 | 0.83 | 0.16 | 0.27*** | 0.83 | 0.16 | 0.27*** |
| Sex | 4.33 | 2.45 | 0.09 | 3.05 | 2.20 | 0.07 | 2.72 | 2.18 | 0.06 |
| BMI | 1.85 | 0.80 | 0.48*** | 1.85 | 0.20 | 0.47*** | |||
| PA | 0.10 | 0.04 | 0.13** | ||||||
| R2 | 0.02 | 0.21 | 0.23 | ||||||
| F for change in R2 | 3.10* | 87.73*** | 7.60*** | ||||||
| MCS | |||||||||
| Age | 0.02 | 0.15 | 0.01 | 0.21 | 0.16 | 0.08 | 0.21 | 0.16 | 0.08 |
| Sex | 4.91 | 2.34 | 0.12* | 4.61 | 2.21 | 0.11* | 4.06 | 2.24 | 0.10 |
| BMI | 0.84 | 0.21 | 0.24** | 0.81 | 0.20 | 0.23** | |||
| PA | 0.13 | 0.04 | 0.20*** | ||||||
| R2 | 0.02 | 0.07 | 0.10 | ||||||
| F for change in R2 | 2.29 | 16.71*** | 13.20*** | ||||||
| Vitality | |||||||||
| Age | 0.26 | 0.14 | 0.11 | 0.03 | 0.14 | 0.01 | 0.04 | 0.14 | 0.02 |
| Sex | 2.92 | 2.02 | 0.08 | 2.35 | 1.96 | 0.06 | 1.84 | 1.91 | 0.05 |
| BMI | 0.84 | 0.18 | 0.27*** | 0.81 | 0.17 | 0.24*** | |||
| PA | 0.15 | 0.03 | 0.24*** | ||||||
| R2 | 0.02 | 0.08 | 0.14 | ||||||
| F for change in R2 | 3.34* | 22.28*** | 22.03*** | ||||||
| Psychological well-being | |||||||||
| Age | 0.23 | 0.14 | 0.09 | 0.11 | 0.14 | 0.05 | 0.12 | 0.14 | 0.05 |
| Sex | 2.91 | 2.03 | 0.08 | 2.70 | 2.02 | 0.07 | 2.30 | 2.00 | 0.06 |
| BMI | 0.41 | 0.18 | 0.13* | 0.39 | 0.18 | 0.13* | |||
| PA | 0.11 | 0.03 | 0.18** | ||||||
| R2 | 0.02 | 0.03 | 0.06 | ||||||
| F for change in R2 | 2.71 | 4.98* | 11.32* |
Solution
The largest value of R2 is 0.23 for physical function. Therefore age, sex, and BMI accounted for the largest amount of variability for physical function.
