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