Table 4.
Percentage Weight Change for Members With Consecutive Annual Renewal
| Average cumulative weight change at renewal, %, mean (95% CI)*, ** | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| |||||||||
| Renewal period | N | Starting Weight, kg Mean (95% CI) | YEAR 1 | YEAR 2 | YEAR 3 | YEAR 4 | YEAR 5 | YEAR 6 | YEAR 7 |
| 1 year | |||||||||
| Females | 69,489 | 97.9 (97.7, 98.0) | −6.0 (−6.0, −5.9) | ||||||
| Males | 5,140 | 119.2 (118.4, 119.9) | −6.3 (−6.5, −6.1) | ||||||
|
| |||||||||
| 2 years | |||||||||
| Females | 38,236 | 97.4 (97.2, 97.6) | −6.7 (−6.8, −6.6) | −6.7 (−6.8, −6.7) | |||||
| Males | 2,844 | 118.9 (117.9, 119.8) | −7.2 (−7.5, −6.9) | −7.1 (−7.5, −6.8) | |||||
|
| |||||||||
| 3 years | |||||||||
| Females | 23,380 | 97.0 (96.7, 97.3) | −6.9 (−7.0, −6.8) | −7.1 (−7.2, −7.0) | −6.9 (−7.1, −6.8) | ||||
| Males | 1,697 | 118.3 (117.1, 119.5) | −7.4 (−7.8, −7.0) | −7.5 (−7.9, −7.0) | −7.2 (−7.7, −6.7) | ||||
|
| |||||||||
| 4 years | |||||||||
| Females | 14,549 | 96.6 (96.3, 96.9) | −7.0 (−7.1, −6.9) | −7.3 (−7.5, −7.2) | −7.2 (−7.4, −7.1) | −7.2 (−7.3, −7.0) | |||
| Males | 1,022 | 117.7 (116.1, 119.3) | −7.5 (−8.0, −7.0) | −7.6 (−8.2, −7.0) | −7.5 (−8.1, −6.9) | −7.3 (−7.9, −6.7) | |||
|
| |||||||||
| 5 years | |||||||||
| Females | 8,855 | 96.5 (96.1, 96.9) | −7.2 (−7.3, −7.0) | −7.5 (−7.7, −7.4) | −7.4 (−7.6, −7.2) | −7.4 (−7.6, −7.2) | −7.5 (−7.7, −7.3) | ||
| Males | 646 | 116.3 (114.4, 118.3) | −7.4 (−8.1, −6.8) | −7.8 (−8.5, −7.0) | −7.6 (−8.4, −6.9) | −7.5 (−8.3, −6.7) | −7.6 (−8.4, −6.8) | ||
|
| |||||||||
| 6 years | |||||||||
| Females | 4,983 | 96.2 (95.6, 96.7) | −7.2 (−7.4, −7.0) | −7.7 (−7.9, −7.4) | −7.5 (−7.7, −7.2) | −7.4 (−7.6, −7.1) | −7.6 (−7.9, −7.4) | −7.9 (−8.2, −7.7) | |
| Males | 364 | 118.3 (115.5, 121.0) | −7.3 (−8.1, −6.4) | −7.6 (−8.6, −6.6) | −7.7 (−8.8, −6.6) | −7.2 (−8.3, −6.1) | −7.3 (−8.3, −6.2) | −7.1 (−8.2, −6.1) | |
|
| |||||||||
| 7 years | |||||||||
| Females | 2,145 | 96.3 (95.5, 97.1) | −7.2 (−7.6, −6.9) | −7.6 (−8.0, −7.2) | −7.4 (−7.8, −7.1) | −7.3 (−7.7, −6.9) | −7.5 (−7.9, −7.1) | −7.9 (−8.3, −7.5) | −8.3 (−8.7, −7.9) |
| Males | 144 | 116.7 (112.4, 120.9) | −7.4 (−8.9, −6.0) | −7.7 (−9.4, −6.0) | −7.8 (−9.5, −6.0) | −7.3 (−9.1, −5.6) | −7.6 (−9.4, −5.8) | −7.5 (−9.4, −5.7) | −7.8 (−9.6, −6.0) |
*
p-values <0.001 for difference between cumulative weight change and starting weight.
**
There was no statistically significant difference between the weight change at year one and subsequent years of follow up, except for years 6 and 7 for females (p=0.001 and p<0.001, respectively).