Table 1.
Incidence of non-Hodgkin and Hodgkin lymphoma in 1973–2009 by season or month of birth
| Births N (%) | NHL cases | HL cases | |||
|---|---|---|---|---|---|
|
| |||||
| n (%) | Ratea | n (%) | Ratea | ||
| Overall | 3,571,574 (100.0) | 936 (100.0) | 1.41 | 943 (100.0) | 1.42 |
| Spring | 990,773 (27.7) | 281 (30.0) | 1.49 | 259 (27.5) | 1.38 |
| March | 334,787 (9.4) | 103 (11.0) | 1.60 | 90 (9.5) | 1.40 |
| April | 331,520 (9.3) | 94 (10.0) | 1.49 | 92 (9.8) | 1.46 |
| May | 324,466 (9.1) | 84 (9.0) | 1.38 | 77 (8.2) | 1.26 |
| Summer | 915,888 (25.6) | 255 (27.2) | 1.52 | 242 (25.7) | 1.44 |
| June | 305,267 (8.6) | 92 (9.8) | 1.63 | 85 (9.0) | 1.50 |
| July | 310,043 (8.7) | 84 (9.0) | 1.49 | 77 (8.2) | 1.36 |
| August | 300,578 (8.4) | 79 (8.4) | 1.45 | 80 (8.5) | 1.47 |
| Fall | 822,327 (23.0) | 187 (20.0) | 1.26 | 218 (23.1) | 1.46 |
| September | 291,196 (8.2) | 60 (6.4) | 1.13 | 80 (8.5) | 1.50 |
| October | 278,533 (7.8) | 65 (6.9) | 1.29 | 78 (8.3) | 1.55 |
| November | 252,598 (7.1) | 62 (6.6) | 1.36 | 60 (6.4) | 1.32 |
| Winter | 842,586 (23.6) | 213 (22.8) | 1.35 | 224 (23.8) | 1.42 |
| December | 253,596 (7.1) | 66 (7.1) | 1.44 | 64 (6.8) | 1.40 |
| January | 297,241 (8.3) | 81 (8.7) | 1.43 | 81 (8.6) | 1.43 |
| February | 291,749 (8.2) | 66 (7.1) | 1.19 | 79 (8.4) | 1.42 |
a
Incidence rate per 100,000 person years.
Abbreviations: HL = Hodgkin lymphoma, NHL = non-Hodgkin lymphoma.