Table 6.
Cohort Descriptive Statistics
| 3-Year Mean (SD) Annual Residential Backcasted Exposurea | ||||||
|---|---|---|---|---|---|---|
| Person-Yearsb | UFP Number (particles/cm3) |
UFP Size (nm) |
BC (ng/m3) |
PM2.5 (ug/m3) |
Ox (ppb) |
|
| All | ||||||
| 22,848,100 | 13,982 (6,229) | 33.22 (3.43) | 1,109(552) | 10.16 (1.56) | 35.16 (3.66) | |
| Sex | ||||||
| Female | 12,324,900 | 13,994 (6,240) | 33.22 (3.44) | 1,111(554) | 10.17 (1.54) | 35.14 (3.63) |
| Male | 10,523,200 | 13,968 (6,217) | 33.23 (3.43) | 1,107(550) | 10.14 (1.58) | 35.17 (3.68) |
| Age group (years) | ||||||
| 25 to 29 | 2,237,100 | 14,337 (6,334) | 33.15 (3.36) | 1,139(567) | 10.07 (1.62) | 35.23 (3.87) |
| 30 to 39 | 5,572,300 | 14,069 (6,351) | 33.28 (3.39) | 1,125(560) | 10.11 (1.61) | 35.28 (3.73) |
| 40 to 49 | 5,600,400 | 13,828 (6,172) | 33.30 (3.45) | 1,095(543) | 10.17 (1.55) | 35.18 (3.61) |
| 50 to 59 | 4,188,800 | 13,864 (6,299) | 33.21 (3.47) | 1,090(543) | 10.19 (1.52) | 35.09 (3.59) |
| 60 to 69 | 3,063,500 | 13,961 (6,192) | 33.14 (3.48) | 1,096(542) | 10.23 (1.54) | 35.07 (3.58) |
| 70 to 79 | 1,768,100 | 13,979 (5,923) | 33.13 (3.43) | 1,117(556) | 10.22 (1.50) | 34.98 (3.54) |
| 80 to 89 | 417,800 | 14,094 (5,950) | 33.12 (3.37) | 1,148(576) | 10.10 (1.43) | 34.77 (3.44) |
| Visible minority status | ||||||
| White or Aboriginal | 16,954,300 | 13,705 (5,792) | 33.05 (3.41) | 1,081(542) | 10.11 (1.65) | 34.78 (3.67) |
| Visible minority | 5,893,700 | 14,779 (7,288) | 33.72 (3.44) | 1,189(572) | 10.29 (1.24) | 36.27 (3.39) |
| Immigrant status | ||||||
| Nonimmigrant | 12,172,200 | 13,664 (5,404) | 32.86 (3.42) | 1,033(503) | 9.97 (1.72) | 34.37 (3.64) |
| Immigrant | 10,675,800 | 14,341 (7,030) | 33.63 (3.40) | 1,195(591) | 10.39 (1.30) | 36.12 (3.43) |
| Marital status | ||||||
| Single | 4,550,000 | 14,610 (6,118) | 32.91 (3.33) | 1,152(576) | 10.25 (1.53) | 35.15 (3.76) |
| Common law | 1,862,500 | 13,889 (5,089) | 32.46 (3.34) | 1,004(496) | 9.71 (1.79) | 33.82 (3.66) |
| Married | 13,043,500 | 13,662 (6,409) | 33.50 (3.45) | 1,098(540) | 10.18 (1.53) | 35.40 (3.57) |
| Separated | 664,200 | 14,624 (6,586) | 33.29 (3.47) | 1,201(603) | 10.29 (1.53) | 35.52 (3.69) |
| Divorced | 1,536,500 | 14,514 (6,163) | 32.79 (3.41) | 1,134(580) | 10.17 (1.57) | 34.88 (3.69) |
| Widowed | 1,191,300 | 14,121 (5,922) | 33.08 (3.46) | 1,136(571) | 10.26 (1.48) | 35.06 (3.55) |
| Education attainment | ||||||
| Not completed high school | 5,766,200 | 14,174 (6,389) | 33.10 (3.48) | 1,127(565) | 10.35 (1.49) | 35.37 (3.67) |
| High school with or without trades certificate | 6,903,900 | 13,973 (6,379) | 33.17 (3.53) | 1,087(542) | 10.11 (1.57) | 35.08 (3.66) |
| Postsecondary nonuniversity | 4,149,000 | 13,876 (6,269) | 33.31 (3.47) | 1,091(548) | 10.01 (1.61) | 35.04 (3.65) |
| University degree | 6,029,000 | 13,865 (5,835) | 33.34 (3.23) | 1,130(551) | 10.14 (1.55) | 35.12 (3.63) |
| Occupational level | ||||||
| Management | 1,947,900 | 13,525 (6,097) | 33.38 (3.28) | 1,089(548) | 10.08 (1.65) | 35.14 (3.68) |
| Professional | 3,661,100 | 13,683 (5,641) | 33.35 (3.28) | 1,110(538) | 10.13 (1.59) | 35.08 (3.66) |
| Skilled, technical, supervisory | 4,209,800 | 13,814 (6,301) | 33.30 (3.48) | 1,094(547) | 10.09 (1.60) | 35.16 (3.68) |
| Semiskilled | 4,959,500 | 14,166 (6,676) | 33.26 (3.52) | 1,112(555) | 10.16 (1.53) | 35.33 (3.65) |
| Unskilled | 1,607,300 | 14,411 (6,546) | 33.24 (3.49) | 1,174(591) | 10.29 (1.49) | 35.49 (3.70) |
| Not applicable | 6,462,500 | 14,126 (6,087) | 33.04 (3.43) | 1,107(550) | 10.20 (1.53) | 34.99 (3.61) |
| Income adequacy quintile | ||||||
| 1st quintile (lowest) | 4,918,000 | 14,735 (6,423) | 33.04 (3.38) | 1,177(587) | 10.29 (1.48) | 35.37 (3.70) |
| 2nd quintile | 4,689,800 | 14,198 (6,446) | 33.22 (3.48) | 1,131(563) | 10.22 (1.49) | 35.33 (3.63) |
| 3rd quintile | 4,459,400 | 13,883 (6,344) | 33.28 (3.52) | 1,096(544) | 10.14 (1.54) | 35.18 (3.64) |
| 4th quintile | 4,220,500 | 13,587 (6,112) | 33.31 (3.50) | 1,068(526) | 10.07 (1.59) | 35.05 (3.65) |
| 5th quintile (highest) | 4,560,400 | 13,334 (5,611) | 33.29 (3.28) | 1,058(518) | 10.05 (1.70) | 34.80 (3.63) |
BC = black carbon; SD = standard deviation; Ox = oxidant gases; PM2.5 = particulate matter ≤2.5 μm in aerodynamic diameter; UFP = ultrafine particles.
aAll columns showing mean (sd) are the exposure values at cohort entry.
bThe person-years column was rounded to the nearest 100 for confidentiality.