Q16. How long has it been since you had your last sigmoidoscopy or colonoscopy?
The universe for this variable includes all adult respondents between ages 45 and 75 who have had a sigmoidoscopy or colonoscopy. This question was not asked in the mail survey.
| Values | Categories | N | NW | |||
| 1 | Within the past 5 years | 873 | 336,350.5 |
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| 2 | More than 5 but less than 10 years | 156 | 52,294.8 |
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| 3 | More than 10 years | 50 | 15,044.1 |
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| 5 | DK/Ref | 8 | 3,979.4 |
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| 0 | NIU - mail, not an adult aged 50-75 | 5407 | 3,678,220.2 |
| Valid cases | 1087 | 407668.816 |
| Missing cases | 5407 | 3678220.184 |
| This variable is numeric |
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