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A random sample survey result comparing smoking status on death certificate with that from a telephone survey in 2015, Tianjin, China
|
Smoking status |
Death certification by doctors | |||
|---|---|---|---|---|
| Ever smoker | Never smoker | Missing | ||
| Telephone interview by CDC staff | Ever smoker | 1058 | 143 | 45 |
| Never smoker | 61 | 524 | 80 | |
| Missing | 1 | 1 | 0 | |
| Kappa | 3×3 | 0.65 | ||
| 2×2 excluding missing | 0.75 | |||
