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National Longitudinal Surveys
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Sample Retention and Reasons for Non‐Interview
| Cohort | Round | Total Sample Interviewed | Retention Rate (percent) | Description |
|---|---|---|---|---|
|
NLSY97 |
Round 20 | 6,713 | 74.7 |
Retention rate is calculated by dividing the number of respondents interviewed in Round 20 by the number of respondents first interviewed in Round 1 (1997). The number of respondents eligible for the interview (including deceased respondents) was 8,984 beginning in Round 1 (1997). This table provides Retention Rates in the NLSY97 by sample types and gender for all rounds. |
| NLSY79 | Round 30 | 6,413 | 63.7 |
Retention rate is calculated by dividing the number of respondents interviewed by the number of respondents from the base year who remained eligible for interview. All 1979 (round 1) respondents including those reported as deceased are eligible for interview, except for those who have been permanently dropped from the sample. In the round 29 (2022) survey, 6,413 civilian and military respondents out of the 9,964 eligible were interviewed, for an overall retention rate of 63.7 percent. This table provides Retention Rates in the NLSY79 by sample types for all rounds. |
| Cohort | Round | Total Not Interviewed | Refusal | Deceased | Not Locatable | Others |
|---|---|---|---|---|---|---|
|
NLSY97 |
Round 20 | 2,271 | 1,741 | 267 | 190 | 73 |
| NLSY79 | Round 30 | 3,577 | 1,605 | 1,374 | 314 | 284 |
- This table provides reasons for noninterviews in the NLSY97 by sample types for all other previous rounds.
- This table provides reasons for noninterviews in the NLSY79 by sample types for all other previous rounds.
Last Modified Date: May 16, 2025