Table 1 Description of immigrants and controls
From: Risk of colorectal cancer among immigrants to Ontario, Canada
Females | Immigrants | Controls |
|---|---|---|
Overall count | ||
Overall count | 209,843 | 1,049,215 |
Year of index date | ||
1991 - 1995 | 59,210 (28.2%) | 290,050 (28.2%) |
1996 - 2000 | 53,063 (25.3%) | 265,315 (25.3%) |
2001 - 2005 | 64,922 (30.9%) | 324,610 (30.9%) |
2006 - 2008 | 32,648 (15.6%) | 163,240 (15.6%) |
Person years by year of index date | ||
1991 - 1995 | 940,939 person-years | 5,292,802 person-years |
1996 - 2000 | 725,818 person-years | 3,915,579 person-years |
2001 - 2005 | 646,525 person-years | 3496,374 person-years |
2006 - 2008 | 225,685 person-years | 1,213,181 person-years |
Followup time by year of index date | ||
1991 - 1995 | ||
Mean (SD) | 15.89 years (7.59) | 17.88 years (6.03) |
Median (IQR) | 19.76 years (9.88 - 21.55) | 20.28 years (16.26 - 21.78) |
1996 - 2000 | ||
Mean (SD) | 13.68 years (5.18) | 14.76 years (4.12) |
Median (IQR) | 15.40 years (13.08 - 17.27) | 15.76 years (14.31 - 17.44) |
2001 - 2005 | ||
Mean (SD) | 9.96 years (3.48) | 10.77 years (2.62) |
Median (IQR) | 10.84 (9.24 - 12.43) | 11.19 years (9.78 - 12.56) |
2006 - 2008 | ||
Mean (SD) | 6.91 years (2.09) | 7.43 years (1.45) |
Median (IQR) | 7.44 years (6.71 - 8.27) | 7.64 years (7.02 - 8.35) |
Age at index date | ||
40 - 49 years | 97,829 (46.6%) | 489,110 (46.6%) |
50 - 59 years | 51,806 (24.7%) | 259,489 (24.7%) |
60 - 69 years | 41,029 (19.6%) | 204,985 (19.5%) |
70 - 74 years | 10,342 (4.9%) | 51,447 (4.9%) |
> = 75 years | 8837 (4.2%) | 44,184 (4.2%) |
Person years by age at index date | ||
40 - 49 years | 1,235,292 person-years | 6,646,937 person-years |
50 - 59 years | 664,305 person-years | 3,624,482 person-years |
60 - 69 years | 470,317 person-years | 2,700,938 person-years |
70 - 74 years | 100,008 person-years | 578,455 person-years |
> = 75 years | 69,043.82 person-years | 367,123.65 person-years |
Followup time by age at index date | ||
40 - 49 years | ||
Mean (SD) | 12.63 years (5.78) | 13.59 years (5.25) |
Median (IQR) | 12.34 years (8.44 - 17.27) | 13.17 years (9.37 - 17.83) |
50 - 59 years | ||
Mean (SD) | 12.82 years (6.24) | 13.97 years (5.56) |
Median (IQR) | 12.63 years (8.25 - 18.24) | 13.56 years (9.39 - 18.82) |
60 - 69 years | ||
Mean (SD) | 11.46 years (6.46) | 13.18 years (5.70) |
Median (IQR) | 11.42 years (6.87 - 16.66) | 12.90 years (8.72 - 17.86) |
70 - 74 years | ||
Mean (SD) | 9.67 years (6.16) | 11.24 years (5.53) |
Median (IQR) | 9.32 years (4.57 - 14.15) | 10.98 years (7.30 - 15.17) |
> = 75 years | ||
Mean (SD) | 7.81 years (5.28) | 8.31 years (5.04) |
Median (IQR) | 7.34 years (3.39 - 11.48) | 7.89 years (4.30 - 11.70) |
Males | Immigrants | Controls |
Overall count | 191,792 | 958,960 |
Year of index date | ||
1991 - 1995 | 48,793 (25.4%) | 243,965 (25.4%) |
1996 - 2000 | 51,328 (26.8%) | 256,640 (26.8%) |
2001 - 2005 | 62,371 (32.5%) | 311,855 (32.5%) |
2006 - 2008 | 29,300 (15.3%) | 146,500 (15.3%) |
Person years by year of index date | ||
1991 - 1995 | 744,331 person-years | 4,121,283 person-years |
1996 - 2000 | 685,887 person-years | 3,702,915 person-years |
2001 - 2005 | 601,385 person-years | 3,273,836 person-years |
2006 - 2008 | 196,843 person-years | 1,062,171 person-years |
Followup time by year of index date | ||
1991 - 1995 | ||
Mean (SD) | 15.25 years (7.73) | 16.89 (6.58) |
Median (IQR) | 19.45 years (8.28 - 21.30) | 19.78 (13.12 - 21.56) |
1996 - 2000 | ||
Mean (SD) | 13.36 years (5.32) | 14.43 (4.34) |
Median (IQR) | 15.22 years (11.58 - 17.15) | 15.56 (14.16 - 17.32) |
2001 - 2005 | ||
Mean (SD) | 9.64 years (3.69) | 10.50 (2.88) |
Median (IQR) | 10.62 years (9.03 - 12.36) | 11.04 (9.50 - 12.50) |
2006 - 2008 | ||
Mean (SD) | 6.72 years (2.26) | 7.25 (1.66) |
Median (IQR) | 7.37 years (6.58 - 8.24) | 7.56 (6.90 - 8.31) |
Age at index date | ||
40 - 49 years | 106,112 (55.3%) | 530,757 (55.3%) |
50 - 59 years | 40,062 (20.9%) | 200,563 (20.9%) |
60 - 69 years | 31,575 (16.5%) | 157,362 (16.4%) |
70 - 74 years | 8070 (4.2%) | 40,492 (4.2%) |
> = 75 years | 5973 (3.1%) | 29,786 (3.1%) |
Person years by age at index date | ||
40 - 49 years | 1,289,734 person-years | 7,047,301 person-years |
50 - 59 years | 485,469 person-years | 2,620,618 person-years |
60 - 69 years | 344,004 person-years | 1,886,805 person-years |
70 - 74 years | 69,618 person-years | 390,565 person-years |
> = 75 years | 39,621 person-years | 214,918 person-years |
Followup time by age at index date | ||
40 - 49 years | ||
Mean (SD) | 12.15 years (5.85) | 13.28 years (5.23) |
Median (IQR) | 12.12 years (8.09 - 16.70) | 13.09 years (9.31 - 17.36) |
50 - 59 years | ||
Mean (SD) | 12.12 years (6.11) | 13.07 years (5.57) |
Median (IQR) | 11.90 years (7.75 - 17.18) | 12.61 years (8.69 - 17.70) |
60 - 69 years | ||
Mean (SD) | 10.89 years (6.39) | 11.99 years (5.77) |
Median (IQR) | 10.81 years (6.36 - 15.76) | 11.65 years (7.81 - 16.43) |
70 - 74 years | ||
Mean (SD) | 8.63 years (5.80) | 9.65 years (5.29) |
Median (IQR) | 8.16 years (3.81 - 12.62) | 9.11 years (6.09 - 13.08) |
> = 75 years | ||
Mean (SD) | 6.63 years (5.03) | 7.22 years (4.66) |
Median (IQR) | 6.18 years (2.18 - 9.90) | 6.90 years (3.39 - 10.31) |