Table 1.
Selected baseline characteristics* by category of social network size, Pathways (N=3,139).
| Social network size | ||||
|---|---|---|---|---|
| Socially integrated |
Moderately integrated |
Socially isolated | p-trend | |
| N (%) | 1,462 (46.5) | 1,219 (38.8) | 482 (15.1) | |
| Family history of breast cancer (%) | 21.4 | 19.9 | 19.3 | 0.51 |
| Any comorbidity (%) | 8.9 | 11.0 | 14.8 | <0.001 |
| Demographic variables | ||||
| Age (mean years) | 59.6 | 59.2 | 60.3 | 0.28 |
| Race/Ethnicity (%) | ||||
| Caucasian | 68.4 | 66.2 | 59.3 | 0.01† |
| African-American | 10.2 | 7.0 | 6.5 | |
| Asian | 10.6 | 12.0 | 14.9 | |
| Hispanic | 11.6 | 11.8 | 12.2 | |
| Other | 2.9 | 3.0 | 3.3 | |
| Income <$25K (%) | 6.0 | 10.1 | 19.1 | <0.001 |
| Education ≥ college (%) | 53.8 | 47.1 | 40.2 | <0.001 |
| Severity of disease | ||||
| Stage | ||||
| I (%) | 51.8 | 54.2 | 53.4 | 0.80† |
| II (%) | 35.5 | 35.0 | 34.3 | |
| III (%) | 10.9 | 9.4 | 10.1 | |
| IV (%) | 1.9 | 1.4 | 2.2 | |
| Nodal involvement (%) | 33.0 | 30.0 | 31.6 | 0.28 |
| ER positive (%) | 81.8 | 83.8 | 80.6 | 0.24 |
| HER-2-neu positive (%) | 13.4 | 11.8 | 15.2 | 0.21 |
| Treatment | ||||
| Chemotherapy (%) | 47.5 | 44.6 | 44.2 | 0.21 |
| Radiation (%) | 36.3 | 34.3 | 35.8 | 0.60 |
| Lumpectomy (%) | 52.9 | 55.9 | 52.8 | 0.23 |
| Mastectomy (%) | 28.5 | 25.9 | 29.3 | 0.20 |
| Hormone treatment (%) | 40.9 | 40.1 | 41.0 | 0.92 |
| Behavioral factors | ||||
| Body mass index (kg/m2) | 28.1 | 28.0 | 29.0 | 0.001 |
| Physical activity (MET hr/wk) | 33.2 | 28.1 | 23.2 | 0.001 |
| Current smokers (%) | 7.0 | 13.8 | 15.5 | <0.001 |
| Reproductive factors | ||||
| Postmenopausal (%) | 70.8 | 72.4 | 70.1 | 0.28 |
| Age at menarche < 12 y (%) | 22.0 | 23.3 | 23.1 | 0.72 |
| OC use (%) | 74.8 | 74.8 | 71.2 | 0.23 |
| Social variables | ||||
| Provide caregiving (%) | 33.7 | 29.7 | 24.9 | <0.001 |
| Living mother (%) | 41.4 | 38.1 | 40.4 | 0.12 |
| Living father (%) | 26.2 | 24.9 | 22.3 | 0.22 |
| Number of children (mean) | 2.3 | 2.1 | 2.0 | <0.001 |
| Number of sisters (mean) | 1.4 | 1.2 | 1.3 | 0.05 |
| Number of brothers (mean) | 1.4 | 1.3 | 1.3 | 0.04 |
| Married (%) | 77.0 | 48.8 | 24.1 | <0.001 |
| Religious participation (%) | 89.1 | 62.9 | 30.3 | <0.001 |
| Volunteering (%) | 42.8 | 15.3 | 2.7 | <0.001 |
*
Except for age, all variables age-adjusted
†
Mantel-Haenszel χ2 test