Table 4.
Results From Retrospective Analysis of Residential Addresses Provided by LexisNexisa With Start Dates Prior to the Date of Enrollment (1995–1996) for all California Teachers Study Participants (n = 123,828 Addresses for 133,479 Participants)
| Characteristic | No. of CTS Participants | % of CTS Participants |
|---|---|---|
| Total no. of unique retrospective addresses per person | ||
| 0 | 29,853 | 22 |
| 1 | 86,032 | 64 |
| 2 | 15,400 | 12 |
| 3 | 1,876 | 1 |
| 4 | 258 | <1 |
| 5 | 41 | <1 |
| 6–14 | 19 | <1 |
| Earliest calendar year for which an address was available | ||
| 1990 or later | 26,182 | 19 |
| 1985–1989 | 30,578 | 23 |
| 1980–1984 | 22,516 | 17 |
| 1975–1979 | 11,318 | 8 |
| 1970–1974 | 6,625 | 5 |
| 1965–1969 | 2,832 | 2 |
| Before 1965 | 3,575 | 3 |
| No address provided | 29,853 | 22 |
| Youngest age for which a full address was available, years | ||
| ≤19 | 1,527 | 1 |
| 20–29 | 15,484 | 12 |
| 30–39 | 31,499 | 24 |
| 40–49 | 24,052 | 18 |
| 50–59 | 15,085 | 11 |
| 60–69 | 10,074 | 8 |
| 70–79 | 3,911 | 3 |
| ≥80 | 760 | 1 |
| Invalid (<0 years) | 1,234 | 1 |
| No address provided | 29,853 | 22 |
| Preenrollment time at baseline address, yearsb | ||
| ≤1 | 4,385 | 3 |
| >1–5 | 23,929 | 18 |
| >5–10 | 30,422 | 23 |
| >10–15 | 19,976 | 15 |
| >15–20 | 9,653 | 7 |
| >20–25 | 6,089 | 5 |
| >25–30 | 2,663 | 2 |
| >30–40 | 1,748 | 1 |
| >40 | 1,727 | 1 |
| Missing datac | 3,034 | 1 |
| No address provided | 29,853 | 22 |
Abbreviation: CTS, California Teachers Study.
a LexisNexis is a division of RELX, Inc., Dayton, Ohio.
b Duration of residence at the participant's baseline address prior to study enrollment.
c Preenrollment time at baseline address could not be calculated for 3,034 participants because their CTS enrollment address was not considered a residential address.