Table 1.
Characteristics of Participants From the MRC National Survey of Health and Development With Complete Data on Activity, BMI, and Covariates at 60–64 Years
| Mean (SD) or % | |||
|---|---|---|---|
| Men (N = 680) | Women (N = 708) | ||
| Activity counts | |||
| Total daily log-activity count | 2961.1 (844.5) | 2943.7 (830.4) | |
| Total daily activity count | 43,088 (22,988) | 41,619 (34,531) | |
| Total log-activity count | |||
| Morning (7am–midday) | 976.2 (372.7) | 947.4 (332.8) | |
| Afternoon (midday–5 pm) | 1022.9 (310.4) | 1045.4 (306.5) | |
| Evening (5 pm–10 pm) | 636.1 (240.9) | 658.9 (255.8) | |
| Night (10 pm–7 am) | 326.0 (230.5) | 292.0 (226.7) | |
| BMI and obesity history | |||
| BMI (kg/m2) | 27.8 (4.1) | 27.9 (5.3) | |
| BMI (kg/m2) | <25.0* | 26.6 | 33.1 |
| 25.0–29.9 | 46.3 | 37.6 | |
| 30.0–34.9 | 21.5 | 19.4 | |
| ≥35.0 | 5.6 | 10.0 | |
| Age first obese (y)† | Never | 68.4 | 64.9 |
| 60–64 | 9.5 | 9.3 | |
| 53 | 11.6 | 13.2 | |
| 43 | 5.5 | 6.5 | |
| 26 or 36 | 5.0 | 6.1 | |
| Covariates | |||
| Occupational class | High (I or II) | 59.3 | 41.4 |
| Middle (IIINM or IIIM) | 31.8 | 43.6 | |
| Low (IV or V) | 9.0 | 15.0 | |
| Work status | Working full-time | 50.3 | 14.7 |
| Working part-time | 16.3 | 28.4 | |
| Fully retired | 32.4 | 55.9 | |
| Other‡ | 1.0 | 1.0 | |
| Long-term limiting illness | 21.6 | 22.0 | |
| Symptoms of anxiety and depression (GHQ-28 score ≥ 5) | 11.1 | 20.6 | |
| Cardiovascular disease | 8.8 | 3.4 | |
| Diabetes | 7.2 | 6.1 | |
Note: BMI = body mass index; SD = standard deviation.
*BMI < 18.5 kg/m2: 2 men, 5 women.
† N = 1,115 due to missing data on BMI at earlier ages.
‡Includes those who classify themselves as housewives or unemployed (ie, not currently working but seeking employment).