Table:
characteristics
total
men
women

number or %
95% confidence interval
number or %
95% confidence interval
number or %
95% confidence interval

from
to
from
to
from
to

mean age
45.7
45.5
45.9
45.3
44.9
45.6
46.1
45.8
46.4

education

less than college
49.6
44.9
54.2
52.8
47.3
58.2
46.5
41.7
51.3

college
21.3
19.2
23.4
16.6
14.2
19.2
25.9
22.8
29.3

university
29.2
24.4
34.5
30.7
25.3
36.6
27.7
23.1
32.8

household income

less than $40,000
25.2
22.3
28.4
22.3
18.9
26.2
28.1
25.0
31.4

$40,000 to $79,999
34.2
31.5
37.0
32.4
28.3
36.7
36.0
33.5
38.7

$80,000 or more
40.6
37.2
44.1
45.3
41.0
49.8
35.9
32.4
39.5

hours utilitarian walking per week

less than 1
34.2
30.9
37.8
40.1
35.7
44.8
28.4
25.3
31.8

1 to 5
48.0
45.5
50.6
44.6
40.9
48.4
51.4
48.1
54.6

more than 5
17.8
15.5
20.2
15.2
13.1
17.7
20.2
17.4
23.4

hours utilitarian cycling per week

none
94.0
92.4
95.2
91.6
89.1
93.6
96.3
94.7
97.4

less than 1
2.0
1.8
3.1
3.2
2.3
4.4
1.6
0.9
2.9

1 or more
3.7
2.6
5.1
5.3
3.6
7.5
2.1
1.4
3.2

physical activity minutes per day

sedentary
583.9
578.6
589.3
577.5
570.4
584.6
590.3
584.1
596.5

light
239.6
232.3
246.9
246.7
236.3
257.1
232.6
226.4
238.9

moderate-to-vigorous
22.7
20.8
24.6
26.1
23.8
28.5
19.3
17.5
21.2

health-related measures

bmi
27.3
26.9
27.7
27.6
27.2
28.0
27.0
26.6
27.5

waist circumference
91.7
90.7
92.8
96.0
94.8
97.1
87.5
86.2
88.8

sum of 5 skinfolds
74.5
73.0
76.0
61.5
59.8
63.2
87.2
85.2
89.2

estimated vo2max(ml o2·kg-1·min-1)
36.2
35.7
36.7
38.8
38.1
39.6
33.4
33.0
33.9

sit and reach
25.9
25.3
26.5
23.0
22.1
23.8
28.9
28.2
29.5

grip strength
70.5
69.3
71.8
89.3
87.6
91.0
52.2
51.2
53.2

systolic blood pressure
112.6
111.5
113.6
114.8
113.6
116.0
110.3
109.3
111.4

diastolic blood pressure
71.8
71.1
72.5
74.0
73.0
74.8
69.5
68.8
70.3

hdl cholesterol
1.4
1.3
1.4
1.2
1.2
1.3
1.5
1.5
1.6

total cholesterol
5.0
4.9
5.1
5.0
4.9
5.1
5.0
5.0
5.1

total cholesterol/hdl
3.9
3.8
4.0
4.3
4.2
4.4
3.5
3.4
3.6

glycohemoglobin
5.7
5.6
5.8
5.7
5.6
5.8
5.6
5.6
5.7

c-reactive protein
22.9
21.7
23.9
20.2
19.1
21.4
25.5
23.8
27.1

triglycerides
1.4
1.3
1.4
1.5
1.4
1.6
1.3
1.2
1.3

Analyze the provided table and extract the contents of specified rows or columns, identified by row or column indices. Show the cells in each row or column in the JSON format {"row_id/column_id":"<row or column index>", "cell_list":"<a list of cells in this row/column>"}. For example, {"row_id":"3", "cell_list": ["A", "B", "C"]}.
Target rows or columns:
row 13,
row 18,
column 4,
row 31,
row 37,

The extracted row or column contents are listed below.
For row 13: {"row_id": "13", "cell_list": ['hours utilitarian walking per week', '', '', '', '', '', '', '', '', '']}
For row 18: {"row_id": "18", "cell_list": ['none', '94.0', '92.4', '95.2', '91.6', '89.1', '93.6', '96.3', '94.7', '97.4']}
For column 4: {"column_id": "4", "cell_list": ['', '', 'to', '45.9', '', '54.2', '23.4', '34.5', '', '28.4', '37.0', '44.1', '', '37.8', '50.6', '20.2', '', '95.2', '3.1', '5.1', '', '589.3', '246.9', '24.6', '', '27.7', '92.8', '76.0', '36.7', '26.5', '71.8', '113.6', '72.5', '1.4', '5.1', '4.0', '5.8', '23.9', '1.4']}
For row 31: {"row_id": "31", "cell_list": ['grip strength', '70.5', '69.3', '71.8', '89.3', '87.6', '91.0', '52.2', '51.2', '53.2']}
For row 37: {"row_id": "37", "cell_list": ['glycohemoglobin', '5.7', '5.6', '5.8', '5.7', '5.6', '5.8', '5.6', '5.6', '5.7']}