combined_dep_and_ckb_logo

Section

Background.Open Access Standard

Data summary

Baseline

Variable Stats / Values Freqs (% of Valid) Graph Missing
region_code [factor]
  1. Qingdao (Urban)
  1. Harbin (Urban)
  1. Haikou (Urban)
  1. Suzhou (Urban)
  1. Liuzhou (Urban)
  1. Sichuan (Rural)
  1. Gansu (Rural)
  1. Henan (Rural)
  1. Zhejiang (Rural)
  1. Hunan (Rural)
36469 ( 7.1% )
58067 ( 11.3% )
30007 ( 5.8% )
53463 ( 10.4% )
50337 ( 9.8% )
55739 ( 10.8% )
50143 ( 9.7% )
63388 ( 12.3% )
57723 ( 11.2% )
60077 ( 11.7% )
0 (0.0%)
study_date [POSIXct, POSIXt]
min : 2004-06-25 10:14:31
med : 2006-09-05 14:48:59
max : 2009-08-05 14:28:17
range : 5y 1m 11d 4H 13M 46S
510214 distinct values 0 (0.0%)
region_is_urban [factor]
  1. Rural
  1. Urban
287070 ( 55.7% )
228343 ( 44.3% )
0 (0.0%)
study_date_year [integer]
Mean (sd) : 2006.1 (1.1)
min ≤ med ≤ max:
2004 ≤ 2006 ≤ 2009
IQR (CV) : 2 (0)
2004 : 31969 ( 6.2% )
2005 : 132390 ( 25.7% )
2006 : 142585 ( 27.7% )
2007 : 147963 ( 28.7% )
2008 : 60501 ( 11.7% )
2009 : 5 ( 0.0% )
0 (0.0%)
study_date_month [integer]
Mean (sd) : 6.8 (3.4)
min ≤ med ≤ max:
1 ≤ 7 ≤ 12
IQR (CV) : 6 (0.5)
12 distinct values 0 (0.0%)
study_date_day [integer]
Mean (sd) : 16.3 (8.4)
min ≤ med ≤ max:
1 ≤ 16 ≤ 31
IQR (CV) : 15 (0.5)
31 distinct values 0 (0.0%)
study_date_hour [integer]
Mean (sd) : 11.9 (2.6)
min ≤ med ≤ max:
0 ≤ 11 ≤ 23
IQR (CV) : 4 (0.2)
23 distinct values 0 (0.0%)
age_at_study_date_x100 [integer]
Mean (sd) : 5202.8 (1070.6)
min ≤ med ≤ max:
1871 ≤ 5149 ≤ 9561
IQR (CV) : 1679 (0.2)
5266 distinct values 0 (0.0%)
is_female [factor]
  1. Male
  1. Female
211054 ( 40.9% )
304359 ( 59.1% )
0 (0.0%)
dob_anon [POSIXct, POSIXt]
min : 1910-10-15
med : 1955-02-15
max : 1987-07-15
range : 76y 9m 0d
758 distinct values 0 (0.0%)
dob_y [integer]
Mean (sd) : 1954.1 (10.7)
min ≤ med ≤ max:
1910 ≤ 1955 ≤ 1987
IQR (CV) : 17 (0)
70 distinct values 0 (0.0%)
dob_m [integer]
Mean (sd) : 6.7 (3.5)
min ≤ med ≤ max:
1 ≤ 7 ≤ 12
IQR (CV) : 6 (0.5)
12 distinct values 0 (0.0%)
dob_d_anon [integer] 1 distinct value
15 : 515413 ( 100.0% )
0 (0.0%)
open_access_censoring_date [POSIXct, POSIXt]
min : 2004-07-30
med : 2016-12-31
max : 2016-12-31
range : 12y 5m 1d
4319 distinct values 0 (0.0%)
open_access_censoring_reason [character]
  1. Dead 
    ·
  1. Duplicate 
    ·
  1. Global censoring date 
    ·
  1. Lost to followup 
    ·
44154 ( 8.6% )
2185 ( 0.4% )
465576 ( 90.3% )
3498 ( 0.7% )
0 (0.0%)

Generated by summarytools 1.0.1 (R version 4.3.1)
2024-02-27

Qc

Variable Stats / Values Freqs (% of Valid) Graph Missing
study_date [POSIXct, POSIXt]
min : 2004-06-30 13:40:18
med : 2006-11-03 09:12:37.5
max : 2008-07-18 10:00:35
range : 4y 0m 17d 20H 20M 17S
15807 distinct values 0 (0.0%)
study_date_year [integer]
Mean (sd) : 2006.3 (1.1)
min ≤ med ≤ max:
2004 ≤ 2006 ≤ 2008
IQR (CV) : 2 (0)
2004 : 854 ( 5.4% )
2005 : 3660 ( 23.1% )
2006 : 4200 ( 26.6% )
2007 : 4615 ( 29.2% )
2008 : 2487 ( 15.7% )
0 (0.0%)
study_date_month [integer]
Mean (sd) : 6.9 (3.5)
min ≤ med ≤ max:
1 ≤ 7 ≤ 12
IQR (CV) : 6 (0.5)
12 distinct values 0 (0.0%)
study_date_day [integer]
Mean (sd) : 17 (8.7)
min ≤ med ≤ max:
1 ≤ 18 ≤ 31
IQR (CV) : 14 (0.5)
31 distinct values 0 (0.0%)
study_date_hour [integer]
Mean (sd) : 11.2 (2.6)
min ≤ med ≤ max:
1 ≤ 10 ≤ 23
IQR (CV) : 4 (0.2)
22 distinct values 0 (0.0%)
qc_is_female [factor]
  1. Male
  1. Female
6593 ( 41.7% )
9223 ( 58.3% )
0 (0.0%)
qc_dob_y [integer]
Mean (sd) : 1953.9 (10.8)
min ≤ med ≤ max:
1924 ≤ 1954 ≤ 1981
IQR (CV) : 17 (0)
52 distinct values 0 (0.0%)
qc_dob_m [integer]
Mean (sd) : 6.7 (3.5)
min ≤ med ≤ max:
1 ≤ 7 ≤ 12
IQR (CV) : 6 (0.5)
12 distinct values 0 (0.0%)
qc_dob_d_anon [integer] 1 distinct value
15 : 15816 ( 100.0% )
0 (0.0%)
qc_dob_anon [POSIXct, POSIXt]
min : 1924-03-15
med : 1954-10-15
max : 1981-10-15
range : 57y 7m 0d
555 distinct values 0 (0.0%)

Generated by summarytools 1.0.1 (R version 4.3.1)
2024-02-27

Resurvey 1

Variable Stats / Values Freqs (% of Valid) Graph Missing
study_date [POSIXct, POSIXt]
min : 2008-05-26 09:14:06
med : 2008-08-04 17:15:50
max : 2008-10-10 12:58:54
range : 4m 14d 3H 44M 48S
19714 distinct values 0 (0.0%)
study_date_year [integer] 1 distinct value
2008 : 19803 ( 100.0% )
0 (0.0%)
study_date_month [integer]
Mean (sd) : 7.6 (1)
min ≤ med ≤ max:
5 ≤ 8 ≤ 10
IQR (CV) : 1 (0.1)
5 : 299 ( 1.5% )
6 : 1744 ( 8.8% )
7 : 6738 ( 34.0% )
8 : 7417 ( 37.5% )
9 : 3068 ( 15.5% )
10 : 537 ( 2.7% )
0 (0.0%)
study_date_day [integer]
Mean (sd) : 16 (8.6)
min ≤ med ≤ max:
1 ≤ 16 ≤ 31
IQR (CV) : 14 (0.5)
31 distinct values 0 (0.0%)
study_date_hour [integer]
Mean (sd) : 11.8 (2.6)
min ≤ med ≤ max:
7 ≤ 11 ≤ 22
IQR (CV) : 4 (0.2)
16 distinct values 0 (0.0%)
age_at_study_date_x100 [integer]
Mean (sd) : 5464.4 (1062.8)
min ≤ med ≤ max:
2743 ≤ 5426 ≤ 8509
IQR (CV) : 1689 (0.2)
4163 distinct values 0 (0.0%)

Generated by summarytools 1.0.1 (R version 4.3.1)
2024-02-27

Resurvey 2

Variable Stats / Values Freqs (% of Valid) Graph Missing
study_date [POSIXct, POSIXt]
min : 2013-08-04 10:40:22
med : 2013-12-31 10:38:06
max : 2014-09-18 10:18:17
range : 1y 1m 13d 23H 37M 55S
25023 distinct values 170 (0.7%)
study_date_year [integer]
Min : 2013
Mean : 2013.5
Max : 2014
2013 : 12609 ( 50.3% )
2014 : 12473 ( 49.7% )
170 (0.7%)
study_date_month [integer]
Mean (sd) : 7.6 (3.1)
min ≤ med ≤ max:
1 ≤ 8 ≤ 12
IQR (CV) : 5 (0.4)
11 distinct values 170 (0.7%)
study_date_day [integer]
Mean (sd) : 16 (8.4)
min ≤ med ≤ max:
1 ≤ 16 ≤ 31
IQR (CV) : 14 (0.5)
31 distinct values 170 (0.7%)
study_date_hour [integer]
Mean (sd) : 11.9 (2.1)
min ≤ med ≤ max:
8 ≤ 11 ≤ 19
IQR (CV) : 4 (0.2)
12 distinct values 170 (0.7%)
age_at_study_date_x100 [integer]
Mean (sd) : 5949 (1017.4)
min ≤ med ≤ max:
2908 ≤ 5927 ≤ 10375
IQR (CV) : 1592 (0.2)
4188 distinct values 170 (0.7%)

Generated by summarytools 1.0.1 (R version 4.3.1)
2024-02-27




International Coordinating Centre, China Kadoorie Biobank (CKB), CTSU, Nuffield Department of Population Health, University of Oxford Old Road Campus, Headington, Oxford, OX3 7LF

Tel: +44 (0)1865 743743 | Fax: +44 (0)1865 743985 | Email:

Copyright China Kadoorie Biobank (CKB), University of Oxford, (2024)

Page generated: 27-02-2024