PS_1. How long has it been since you had your last mammogram?
The responses to PS_1 have been broken up for the 'ever had mammography' variable. The universe for this variable includes all female respondents ages 40 to 75.
| Values | Categories | N | NW | |||
| 0 | No | 120 | 61,453.9 |
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| 1 | Yes | 1811 | 815,796.2 |
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| -8 | Not in universe | 5279 | 3,718,791.2 |
| Valid cases | 1931 | 877250.093 |
| Missing cases | 5279 | 3718791.227 |
| Standard deviation | 0.241 | 0.255 |
| This variable is numeric |
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