Table 1.
Descriptive characteristics of CLL cases.
| Characteristics | All CLL cases (1986–2006) N=79 (%) |
Reduced set of CLL casesa N=65 (%) |
P- Valued |
|---|---|---|---|
| Bone marrow dose, median, mGy (range) | 22.6 (0–1,536.2) | 23.5 (0–1,536.2) | 0.51 |
| Age at first exposure, years, median (range) | 45 (22–63) | 46 (29–63) | 0.50 |
| 22–34 | 11 (13.9) | 8 (12.3) | |
| 35–39 | 15 (19.0) | 12 (18.5) | |
| 40–44 | 14 (17.7) | 9 (13.9) | |
| 45–49 | 17 (21.5) | 16 (24.6) | |
| 50–54 | 11 (13.9) | 10 (15.4) | |
| 55–63 | 11 (13.9) | 10 (15.4) | |
| Age at diagnosis, years, median (range) | 57 (42–78) | 57 (43–76) | 0.94 |
| 42–44 | 6 (7.6) | 5 (7.7) | |
| 45–54 | 25 (31.7) | 20 (30.8) | |
| 55–64 | 35 (44.3) | 28 (43.1) | |
| 65–74 | 9 (11.4) | 9 (13.9) | |
| 75–78 | 4 (5.1) | 3 (4.6) | |
| Latent period, years, median (range) | 14 (1–20) | 12 (1–20) | 0.29 |
| 0–4 | 7 (8.9) | 7 (10.8) | |
| 5–9 | 18 (22.8) | 17 (26.2) | |
| 10–14 | 22 (27.9) | 20 (30.8) | |
| 15–20 | 32 (40.5) | 21 (32.3) | |
| Urban / rural statusb | 0.72 | ||
| Urban | 62 (81.6) | 52 (83.9) | |
| Rural | 11 (14.5) | 8 (12.9) | |
| Mixed | 3 (4.0) | 2 (3.2) | |
| Smokingc | 0.80 | ||
| Never/ former | 36 (48.0) | 28 (45.9) | |
| 10–20 cigarettes per day | 24 (32.0) | 20 (32.8) | |
| More than 20 cigarettes per day | 15 (20.0) | 13 (21.3) | |
| Alcohol consumptionb | 0.99 | ||
| Never | 20 (26.3) | 16 (25.8) | |
| 1–3 times per month | 41 (54.0) | 34 (54.8) | |
| Once per week – every day | 15 (19.7) | 12 (19.4) |
Abbreviations: mGy, milligray.
a
Based on 65 cases with <2 years from start of chemotherapy to interview.
b
Among 76 subjects with known information on alcohol consumption and urban/rural status.
c
Among 75 subjects with known information on on smoking.
d
P-value for heterogeneity from the Wilcoxon Rank Sums test or one-way analysis of variance (ANOVA) for continuous variables and Kruskal Wallis tests for multi-level variables.