Table:
characteristics
geometric mean
95% confidence interval

from
to

total
1.3
1.1
1.4

age group

6 to 8
1.8
1.6
2.1

9 to 11
1.4
1.2
1.7

12 to 14
1.2
1.0
1.4

15 to 17
0.9
0.8
1.1

sex

male
1.2
1.1
1.4

female
1.3
1.2
1.5

time of urine collection

morning
1.1
1.0
1.3

afternoon
1.5
1.3
1.7

evening
1.4
1.0
1.7

ethnicity

white
1.3
1.2
1.5

non-white
1.3
1.0
1.6

exposure to second-hand smoke

once a week or less
1.2
1.1
1.4

every day or almost every day
1.6
1.4
2.0

household income

low/lower-middle
1.7
1.4
2.0

upper-middle
1.2
1.0
1.4

highest
1.2
1.1
1.4

household education

secondary school graduation or less
1.3
1.0
1.6

at least some postsecondary
1.3
1.1
1.5

body mass index

neither overweight nor obese
1.3
1.2
1.5

overweight
1.3
1.0
1.7

obese
1.2
1.0
1.4

Return the merged cell regions in the provided table image. Your answer should be in the JSON format of {'top-left':(X, Y), 'bottom-right':(Z, W)}, where (X, Y) and (Z, W) represent the (row_id, column_id) coordinates of top-left cell and bottom-right cell, respectively. Note that row_id and column_id start from 1 instead of 0.

The merged cell regions are as follows:
{'top-left':(1, 1), 'bottom-right':(2, 1)}
{'top-left':(1, 2), 'bottom-right':(2, 2)}
{'top-left':(1, 3), 'bottom-right':(1, 4)}
{'top-left':(4, 2), 'bottom-right':(4, 4)}
{'top-left':(9, 2), 'bottom-right':(9, 4)}
{'top-left':(12, 2), 'bottom-right':(12, 4)}
{'top-left':(16, 2), 'bottom-right':(16, 4)}
{'top-left':(19, 2), 'bottom-right':(19, 4)}
{'top-left':(22, 2), 'bottom-right':(22, 4)}
{'top-left':(26, 2), 'bottom-right':(26, 4)}
{'top-left':(29, 2), 'bottom-right':(29, 4)}.