MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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- Endocrinology
In Section 2.10, we described Data Set BONEDEN.DAT concerning the effect of tobacco use on BMD.
Note: 2.38-2.40 Involve computing a new variable C. Compute C using the formula given and then use STATA to produce the output requested.
2.38. For each pair of twins, compute the following for the lumbar spine:
A = BMD for the heavier-smoking twin − BMD for the lighter-smoking twin = x1 − x2
B = mean BMD for the twinship = (x1 + x2)/2
C = 100% × (A/B)
Derive appropriate
2.39. Suppose we group the twin pairs according to the difference in tobacco use expressed in 10 pack-year groups (0–9.9 pack-years/10–19.9 pack-years/20–29.9 pack-years/30–39.9 pack-years/40+ pack-years). Compute appropriate descriptive statistics, and provide a
2.40. What impression do you have of the relationship between BMD and tobacco use based on Problem 2.39?
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BONEDEN. DOC
Variable
ID
Age
zyg
ht1
wt1
teal
cof1
alc1
cur1
men1
pyr1
ls1
fn1
fs1
ht2
wt2
tea2
cof2
alc2
cur2
men2
BONEDEN.doc
pyr2
ls2
fn2
fs2
SUB
Twin 1
Twin 2
Column
2-8
9-11
12-14
15-19
20-24
25-29
30-34
35-39
40-44
45-49
50-55
56-61
62-67
68-73
74-78
79-83
84-88
89-93
94-98
99-103
104-108
109-114
115-120
121-126
127-132
Code
Age (yrs)
1=mz_2=dz
Height (cm)
Weight (kg)
Tea (cups/week)
Coffee
Alcohol
Current Smoking (cigarretes/day)
(cups/week)
(drinks/week)
Menopause Status (1=pre/2=post/3=unknown hysterectomy)
Pack-years smoking
Lumbar spine (g/cm**2)
Femoral neck (g/cm**2)
Femoral shaft (g/cm**2)
Height (cm)
Weight (kg)
Tea (cups/week)
Coffee (cups/week)
Alcohol
Current Smoking (cigarretes/day)
Menopause Status (1=pre/2=post/3=unknown hysterectomy)
Pack-years smoking
(drinks/week)
Lumbar spine (g/cm**2)
Femoral neck (g/cm**2)
Femoral shaft (g/cm**2)
Transcribed Image Text:ID
1002501
1015401
1027601
1034301
1121202
1162502
1188701
1248202
1268301
1269402
1273101
1323501
1337102
1467301
1479401
1494101
1497701
1505502
1519402
1521701
1528201
1536201
1536701
1541902
1543602
1596702
1597002
1597601
1607901
1608801
1628601
1635901
1637901
1640701
1643602
1647502
1648701
1657301
1671001
1672702
2609801
age
27
42
59
61
47
33
45
73
43
43
47
47
72
58
36
47
53
49
52
44
55
44
34
37
34
46
49
36
62
76
53
42
47
44
71
72
40
49
45
41
48
zyg
2
2
2
1
2
2
1
1
2
2
2
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
1
1
2
2
1
1
1
1
2
1
2
2
2
2
2
ht1
162
165
150
159
159
163
169
160
162
165
168
168
154
161
162
149
162
164
157
167
165
165
162
163
168
163
164
163
171
161
161
166
157
151
153
152
159
164
161
159
164
wt1
57
76
114
62
58
49
78
76
64
58
60
70
81
61
55
61
62
70
53
60
68
70
60
60
57
58
72
112
97
59
68
66
65
48
49
48
54
55
47
72
71
tea1
35
42
12
56
28
35
42
42
7
7
28
0
14
0
7
0
56
0
28
0
56
0
0
1
42
42
21
1
0
0
35
7
14
12
21
14
21
21
35
0
10
cof1
0
2
0
0
14
0
0
14
2222
28
21
28
21
7
21
14
42
0
28
28
x
28
0
7
49
42
0
0
14
0
7
7
35
7
7
0
7
56
42
7
0
14
0
alc1
1
3
0
0
0
3
1
14
8
6
7
0
0
0
2
2
9
0
1
23
2
1
0
8
0
0
9
0
0
28
0
10
2
0
1
0
0
21
5
0
0
cur1
1
5
0
0
0
1
1
8
3
0
7
0
0
0
0
3
8
1
1
22
3
0
0
3
0
4
12
0
0
28
0
15
2
0
0
0
0
22
0
0
0
men1
0
1
1
1
0
0
0
1
0
1
1
0
1
1
0
1
1
2
1
0
1
1
2
0
0
0
1
0
1
1
1
0
2
0
1
1
1
1
NOO
2
0
0
pyr1
0
0
0
0
0
0
0
25
0.5
0
16.5
0
0
0
0
12
33.75
0
0
0
0
0
0
0
0
0
19
18
0
0
24.65
0
0
28
0
1.3
0
0
0
0
0
Is1
0.81
1.01
0.75
0.81
0.78
0.86
0.95
0.76
0.83
1.01
0.86
0.71
0.71
0.7
0.73
0.71
0.73
0.83
0.65
0.77
0.75
0.89
0.62
1.04
0.87
0.95
0.67
0.71
0.5
0.69
0.82
0.93
0.8
0.86
0.5
0.58
0.98
0.76
0.93
0.82
0.95
fn1
0.72
0.74
0.63
0.64
0.7
0.56
0.83
0.56
0.65
0.9
0.7
0.85
0.55
0.68
0.64
0.61
0.82
0.66
0.66
0.66
0.59
0.78
0.61
0.82
0.65
0.71
0.74
0.6
0.49
0.54
0.69
0.73
0.67
0.6
0.47
0.42
0.69
0.65
0.57
0.67
0.81
fs1
1
0.99
1.05
1.12
1.14
1.13
1.16
1.05
1.07
1.3
1.24
1.21
0.93
1.18
1.09
1.09
1.13
1.01
0.98
1.1
1.14
1.02
1.23
1.24
1.01
1.12
1.14
1.12
1.15
0.81
1.11
1.14
1.22
1.05
0.89
0.7
1.11
1.42
1.06
1.06
1.25
| |
ht2
160
159
156
162
150
158
169
161
162
168
163
167
160
160
163
154
162
165
160
167
165
165
170
163
162
157
164
167
166
155
161
165
165
153
154
155
161
164
165
164
158
wt2
56
72
54
58
58
54
84
76
60
62
53
65
80
73
54
94
55
67
55
43
71
58
72
50
58
51
68
84
56
55
60
60
62
52
43
50
59
52
60
53
88
tea2
42
20
7
21
91
14
21
7
14
0
0
0
0
0
0
0
14
4 14 28
0
21
0
0
0
42
0
21
28
14
35
0
7
0
91
7
14
7
14
0
0
24
cof2
21
21
28
35
0
14
42
7
7
35
68
28
0
14
35
0
21
28
0
28
28
42
21
35
0
35
12
0
56
0
99
14
28
0
7
42
21
0
42
35
0
alc2
0
1
0
0
0
0
2
14
7
35
0
0
0
0
0
0
9
9
0
13
0
16
0
7
0
0
14
2
8
0
0
14
14
0
14
0
28710
cur2
0
1
0
0
1
0
5
10
7
30
0
0
0
ONO
1
8
7
3
20
1
10
0
7
0
0
11
0
4
0
1
10
13
0
14
0
0
28
14
0
0
men2
0
0
1
1
1
0
0
1
0
2
0
0
1
1
0
2
1
0
1
0
1
1
0
0
0
0
1
0
1
1
1
0
0
2
1
1
0
1
2
0
1
pyr2
13.75
48
20.5
29.75
25
5
42
40
10
39
31
23.25
18.5
39
25.5
20
43.75
32
13.2
30
20.25
36.25
12
11.25
8
14
36.3
30
43.2
48
30
8
6
56
64.5
12.6
15.75
21
39
18.75
48
Is2
0.76
0.89
0.51
0.85
0.59
0.83
0.87
0.66
0.98
0.89
0.76
0.8
0.63
0.63
0.7
0.76
0.77
0.79
0.64
0.71
0.64
0.84
0.65
0.92
0.9
0.96
0.74
0.84
0.47
0.48
0.77
0.96
0.75
0.85
0.61
0.51
0.9
0.68
0.86
0.92
0.85
fn2
0.68
0.64
0.64
0.69
0.54
0.5
0.78
0.49
0.77
0.87
0.74
0.76
0.56
0.64
0.61
0.66
0.88
0.63
0.71
0.61
0.65
0.63
0.81
0.67
0.76
0.71
0.74
0.85
0.48
0.38
0.67
0.83
0.63
0.54
0.54
0.46
0.64
0.62
0.71
0.79
0.72
fs2
1.04
1.11
0.86
1.03
0.96
1.06
1.23
1.04
1.15
1.24
1.21
1.09
1.01
1.04
1.2
0.99
1.18
1.15
1.01
0.96
1.15
1.12
1.33
1.08
1.06
1.06
1.1
1.16
0.73
0.64
1.08
1.24
1.12
0.97
0.86
0.66
1.21
1.22
1.03
1.02
1.31
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