Table 2.
Baseline Characteristics of Participants According to Social Isolation Score, by Race and Sex, in the Cancer Prevention Study II Cohort, United States, 1982–2012
| Race-Sex Subgroup and Characteristic | Social Isolation Score | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 0 (Least Isolated) | 1 | 2 | 3 | 4 (Most Isolated) | ||||||
| No. | % | No. | % | No. | % | No. | % | No. | % | |
| Black men | ||||||||||
| No. of men | 2,653 | 36.1 | 2,689 | 36.6 | 1,429 | 19.5 | 498 | 6.8 | 79 | 1.1 |
| Age, yearsa | 55.4 (9.9) | 54.5 (10.9) | 52.9 (11.5) | 51.4 (12.1) | 47.6 (12.1) | |||||
| High school education or moreb | 2,201 | 83.0 | 1,900 | 70.7 | 953 | 66.7 | 305 | 61.2 | 47 | 59.5 |
| Current smokerb | 806 | 30.4 | 951 | 35.4 | 622 | 43.6 | 271 | 54.4 | 54 | 68.4 |
| History of diabetes | 260 | 9.8 | 238 | 8.9 | 131 | 9.2 | 40 | 8.0 | 8 | 10.1 |
| Body mass indexa,c | 26.7 (3.8) | 26.6 (3.9) | 26.5 (4.0) | 26.4 (4.7) | 24.1 (3.7) | |||||
| White men | ||||||||||
| No. of men | 96,902 | 40.7 | 86,786 | 36.4 | 41,146 | 17.3 | 12,196 | 5.1 | 1,176 | 0.5 |
| Age, yearsa | 56.2 (9.0) | 55.6 (9.5) | 54.4 (10.0) | 52.8 (10.8) | 49.3 (13.6) | |||||
| High school education or moreb | 89,544 | 92.4 | 76,129 | 87.7 | 35,393 | 86.0 | 10,387 | 85.2 | 1,023 | 87.0 |
| Current smokerb | 17,576 | 18.2 | 20,396 | 23.5 | 12,295 | 29.9 | 4,346 | 35.7 | 467 | 39.7 |
| History of diabetesb | 3,906 | 4.0 | 3,715 | 4.3 | 1,819 | 4.4 | 561 | 4.6 | 43 | 3.7 |
| Body mass indexa | 26.0 (3.2) | 26.0 (3.3) | 26.0 (3.5) | 25.9 (3.7) | 25.0 (3.9) | |||||
| Black women | ||||||||||
| No. of women | 4,574 | 34.3 | 5,079 | 38.1 | 2,722 | 20.4 | 833 | 6.3 | 112 | 0.8 |
| Age, yearsa | 52.6 (9.6) | 53.4 (11.7) | 53.8 (12.8) | 52.7 (14.5) | 50.9 (15.1) | |||||
| High school education or moreb | 3,962 | 86.6 | 3,993 | 78.6 | 1,843 | 67.7 | 508 | 61.0 | 75 | 67.0 |
| Current smokerb | 1,116 | 24.4 | 1,367 | 26.9 | 856 | 31.4 | 291 | 34.9 | 52 | 46.5 |
| History of diabetes | 332 | 7.3 | 411 | 8.1 | 216 | 7.9 | 73 | 8.8 | 11 | 9.8 |
| Body mass indexa | 26.7 (4.8) | 27.3 (5.4) | 27.1 (5.6) | 27.1 (6.0) | 27.2 (7.0) | |||||
| White women | ||||||||||
| No. of women | 147,035 | 45.8 | 113,524 | 35.3 | 46,458 | 14.5 | 12,365 | 3.9 | 1,926 | 0.6 |
| Age, yearsa | 53.7 (9.1) | 55.3 (10.7) | 55.2 (11.7) | 55.4 (13.1) | 56.4 (15.1) | |||||
| High school education or moreb | 138,458 | 94.2 | 101,348 | 89.3 | 39,720 | 85.5 | 10,112 | 81.8 | 1,497 | 77.7 |
| Current smokerb | 22,680 | 15.4 | 23,410 | 20.7 | 12,885 | 27.7 | 4,272 | 34.6 | 798 | 41.4 |
| History of diabetesb | 3,806 | 2.6 | 3,593 | 3.2 | 1,691 | 3.6 | 544 | 4.4 | 96 | 5.0 |
| Body mass indexa | 24.4 (4.2) | 24.4 (4.4) | 24.5 (4.6) | 24.4 (4.8) | 24.6 (5.4) | |||||
a Values are expressed as mean (standard deviation).
bP < 0.001.
c Weight (kg)/height (m)2.