Table 1 Characteristics of the Small Area Statistics (SAS) and the Sample of Anonymised Records (SAR) samples used in the standard and stratified ecological analyses of lung cancer.
| Variable | SAS sample used in standard ecological analysis (n = 3 667 188) | SAR sample used in stratified ecological analysis (n = 76 217) | ||
|---|---|---|---|---|
| Number | Percentage | Number | Percentage | |
| Age group (years)* | ||||
| 45–49 | 707 832 | 19.3 | 14 461 | 19.0 |
| 50–54 | 655 019 | 17.9 | 13 654 | 17.9 |
| 55–59 | 622 235 | 17.0 | 12 960 | 17.0 |
| 60–64 | 618 267 | 16.9 | 12 820 | 16.8 |
| 65–69 | 597 007 | 16.3 | 12 445 | 16.3 |
| 70–74 | 466 828 | 12.7 | 9877 | 13.0 |
| Sex* | ||||
| Male | 1 752 166 | 47.8 | 36 559 | 48.0 |
| Female | 1 915 022 | 52.2 | 39 658 | 52.0 |
| Ethnicity† | ||||
| White | 3 738 016 | 98.2 | 74 818 | 98.2 |
| Non‐white | 67 942 | 1.8 | 1399 | 1.8 |
| Housing tenure‡ | ||||
| Home owner | 3 196 541 | 65.7 | 53 837 | 71.8 |
| Rent privately | 373 657 | 7.7 | 3938 | 5.3 |
| Rent LA | 1 294 811 | 26.6 | 17 233 | 23.0 |
| Car ownership‡ | ||||
| No car | 1 900 163 | 39.0 | 24 154 | 32.2 |
| One car | 2 050 989 | 42.1 | 33 854 | 45.1 |
| ⩾2 cars | 925 212 | 19.0 | 17 000 | 22.7 |
| Social class§ | ||||
| I and II | 271 694 | 34.9 | 17 144 | 29.8 |
| IIIN | 95 621 | 12.3 | 10 373 | 18.0 |
| IIIM | 247 882 | 31.8 | 14 158 | 24.6 |
| IV and V | 164 101 | 21.1 | 15 923 | 27.6 |
| Economic position† | ||||
| Employed | 1 622 881 | 42.6 | 32 394 | 42.5 |
| Unemployed | 164 362 | 4.3 | 3321 | 4.4 |
| Inactive | 2 018 715 | 53.1 | 40 502 | 53.1 |
| Qualifications¶ | ||||
| Yes | 108 517 | 11.7 | 7902 | 10.4 |
| No | 817 476 | 88.3 | 68 315 | 89.6 |
*For SAS data: People in households aged 45 to 74 years.
†All people aged 45–74 years.
‡All people in households.
§10% sample of all people in households, social class of head of the household.
¶10% sample of all persons aged ⩾18 years.