Table 1.
Patient demographics and consultation rates in the year before diagnosis
| Chronic leukaemia | ||||||
|---|---|---|---|---|---|---|
|
| ||||||
| Cases | Controls | |||||
|
|
|
|||||
| Male (n = 1679) | Female (n = 1198) | Total (n = 2877) | Male (n = 7281) | Female (n = 5530) | Total (n = 12 811) | |
| Median age at diagnosis, years (IQR) | 71 (62–79) | 74 (64–81) | 72 (63–80) | 71 (63–79) | 73 (65–81) | 72 (64–80) |
| Median number of consultations (IQR) | 12 (7–20) | 13 (8–20) | 13a (8–20) | 8 (4–14) | 9 (4–15) | 8a (4–15) |
| Acute leukaemia | ||||||
|---|---|---|---|---|---|---|
|
| ||||||
| Cases | Controls | |||||
|
|
|
|||||
| Male (n = 541) | Female (n = 3962) | Total (n = 937) | Male (n = 2377) | Female (n = 1837) | Total (n = 4214) | |
| Median age at diagnosis, years (IQR) | 72 (63–78) | 73 (64–81) | 72 (63–80) | 72 (65–78) | 73 (64–81) | 73 (64–80) |
| Median number of consultations (IQR) | 16 (9–24) | 16 (9–25) | 16a (9–25) | 8 (4–15) | 9 (4–16) | 8a (4–16) |
a
Cases consulted significantly more often than controls in the year before diagnosis (P ≤0.001). IQR = interquartile range.