Table 2.
Relative risk of demographic factors and lymphedema among subjects diagnosed with breast cancer in Iowa, 2004
| Lymphedema | Adjusted | |||
|---|---|---|---|---|
| Yes | No | RR | CI | |
| Age at interview | ||||
| 75–85 | 12 (11.8) | 86 (20.5) | Ref * | |
| 70–74 | 14 (13.7) | 56 (13.3) | 1.85 | 0.75, 4.55 |
| 65–69 | 16 (15.7) | 51 (12.1) | 1.77 | 0.72, 4.34 |
| 60–64 | 13 (12.8) | 61 (14.5) | 1.29 | 0.52, 3.18 |
| 55–59 | 13 (12.8) | 60 (14.3) | 1.40 | 0.56, 3.49 |
| 50–54 | 14 (13.7) | 57 (13.6) | 1.61 | 0.66, 3.94 |
| 25–49 | 20 (19.6) | 49 (11.7) | 2.95 | 1.25, 6.98 |
| Trend RR comparing age 75–85 to 25–49 | 1.85 | 0.93, 3.70 | ||
| Education | ||||
| ≤ High school | 45 (44.5) | 192 (46.0) | Ref † | |
| Some college | 25 (24.8) | 98 (23.5) | 0.90 | 0.50, 1.63 |
| ≥ College | 31 (30.7) | 127 (30.5) | 0.94 | 0.53, 1.65 |
| Trend RR comparing ≥ College to ≤ High school | 0.93 | 0.53, 1.64 | ||
| Married | ||||
| No | 33 (33.0) | 124 (29.5) | Ref ‡ | |
| Yes | 67 (67.0) | 296 (70.5) | 0.76 | 0.46, 1.23 |
| BMI (kg/m2) | ||||
| <18.5 | 0 | 4 (1.0) | N/A | |
| 18.5–24.9 | 22 (21.8) | 138 (33.1) | Ref c | |
| 25–29.9 | 28 (27.7) | 140 (33.6) | 1.20 | 0.64, 2.23 |
| 30–34.9 | 20 (19.8) | 83 (19.9) | 1.50 | 0.76, 2.98 |
| 35–39.9 | 13 (12.9) | 35 (8.4) | 2.51 | 1.12, 5.65 |
| 40+ | 18 (17.8) | 17 (4.1) | 5.58 | 2.45, 12.7 |
| Trend RR comparing 40+ to 18.5–24.9 | 7.43 | 3.03, 18.2 | ||
RR= relative risk; CI = confidence interval; BMI= body mass index.
Note: Total number of subjects may not add up to 522 due to missing data
*
Adjusted for BMI, axillary dissection, number of lymph nodes removed, any radiation, and any radiation x axillary dissection
†
Adjusted for BMI, age, axillary dissection, any radiation, and any radiation x axillary dissection
‡
Adjusted for age, axillary dissection, any radiation, and any radiation x axillary dissection