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Table 2 Total number of weight records and average time to next weight record by patient characteristics

From: Determinants and extent of weight recording in UK primary care: an analysis of 5 million adults’ electronic health records from 2000 to 2017

Patient characteristic

Total number of weight records (% of total)

Person-years of follow-up (pyrs)

Average time to next weight record (years)

Gender

 Male

5,518,150 (39.3)

11,904,908

2.16

 Female

8,531,721 (60.7)

15,093,683

1.77

Age-group (years)

 18–29

2,484,950 (17.7)

4,708,394

1.89

 30–39

2,138,757 (15.2)

4,705,467

2.20

 40–49

2,237,814 (15.9)

5,038,093

2.25

 50–59

2,556,267 (18.2)

4,905,338

1.92

 60–69

2,457,632 (17.5)

3,969,977

1.62

 70–79

1,612,986 (11.5)

2,549,141

1.58

 80–89

506,102 (3.6)

990,228

1.96

 90+

55,363 (0.4)

131,952

2.38

BMI group

 < 18.5

320,133 (2.3)

577,964

1.81

 18.5–24.99

4,408,222 (31.4)

10,090,299

2.29

 25–29.99

4,492,563 (32)

9,241,932

2.06

 30–34.99

2,644,284 (18.8)

4,111,140

1.55

 35+

1,841,303 (13.1)

1,988,110

1.08

Smoking status

 Non-smoker

7,183,175 (51.1)

14,373,892

2.00

 Current smoker

3,225,927 (23)

6,234,614

1.93

 Ex-smoker

3,073,954 (21.9)

5,510,816

1.79

Alcohol intake

 Non-drinker

2,994,256 (21.3)

4,877,072

1.63

 Drinker

9,097,148 (64.7)

18,360,952

2.02

IMD quintile

 I (least deprived)

2,851,431 (20.3)

6,383,099

2.24

 II

3,074,380 (21.9)

6,230,728

2.03

 III

2,822,249 (20.1)

5,372,371

1.90

 IV

2,858,074 (20.3)

5,029,158

1.76

 V (most deprived)

2,434,544 (17.3)

3,964,040

1.63

Comorbidities

 0

4,466,926 (31.8)

10,975,377

2.46

 1

3,886,327 (27.7)

7,660,234

1.97

 2

2,670,180 (19)

4,348,982

1.63

 3

1,567,840 (11.2)

2,230,399

1.42

 4

802,685 (5.7)

1,035,466

1.29

 5+

655,913 (4.7)

748,134

1.14

Ethnicity

 White

6,956,482 (49.5)

12,463,968

1.79

 Indian

185,039 (1.3)

303,332

1.64

 Bangladeshi

29,569 (0.2)

42,745

1.45

 Pakistani

84,399 (0.6)

120,923

1.43

 Chinese

26,037 (0.2)

55,801

2.14

 Other Asian

93,638 (0.7)

162,136

1.73

 Black African

143,453 (1)

231,100

1.61

 Black Caribbean

89,514 (0.6)

128,434

1.43

 Other Black

33,707 (0.2)

56,913

1.69

 Mixed race

78,337 (0.6)

142,532

1.82

 Other

50,834 (0.4)

89,964

1.77

Total weight records

14,049,871 (100)

26,998,590

1.92