TABLE 2—
Annual Probability of Achieving Normal Weight by Initial BMI Category and Gender: United Kingdom, 2004–2014
| Initial BMI Category | No. Participants | No. Person-Years During Follow-Up | No. Attaining Normal BMI | Annual Probability of Attaining Normal BMI, Estimate (95% CI) |
| Men, kg/m2 | ||||
| 30.0–34.9 | 27 966 | 179 746 | 857 | 1 in 210 (197, 225) |
| 35.0–39.9 | 27 490 | 174 386 | 249 | 1 in 701 (619, 797) |
| 40.0–44.9 | 14 767 | 91 528 | 71 | 1 in 1 290 (1023, 1651) |
| ≥ 45.0 | 6481 | 38 367 | 106 | 1 in 362 (300, 442) |
| Women, kg/m2 | ||||
| 30.0–34.9 | 27 251 | 173 066 | 1 398 | 1 in 124 (118, 131) |
| 35.0–39.9 | 27 373 | 175 356 | 408 | 1 in 430 (390, 475) |
| 40.0–44.9 | 26 716 | 170 483 | 252 | 1 in 677 (599, 769) |
| ≥ 45.0 | 18 451 | 113 540 | 187 | 1 in 608 (527, 704) |
Note. BMI = body mass index; CI = confidence interval. Normal weight is having a BMI < 25 kg/m2.