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From |
Victor Mauricio Herrera <vherrera@wisc.edu> |

To |
statalist <statalist@hsphsun2.harvard.edu> |

Subject |
st: problem with ice in large sample |

Date |
Sat, 29 Aug 2009 09:50:35 -0500 |

Hello stata-users: I'm having problems doing imputations in a large dataset (over 30,000 observations) using Stata/SE 10.1, here is the code: ice study_id log_age sex edu log_weight log_height wc log_hip log_sbp log_dbp hyp hyp_dx hyp_tx log_glucose dm dm_dx dm_tx log_tot_c log_hdl_c log_triglycerides smk fast cvdhis [pweight=sweight], saving(temp3, replace) boot passive(dm:log_glucose>=4.8362819\dm_tx:dm_tx==1 & dm==1\dm_dx:dm_dx==1 & dm==1\ /* */ hyp:log_sbp>=4.9416424 | log_dbp>=4.4998097\hyp_tx:hyp_tx==1 & hyp==1\hyp_dx:hyp_dx==1 & hyp==1) /* */ cmd(log_age log_weight log_height wc log_glucose log_hip log_sbp log_dbp log_glucose log_tot_c log_hdl_c log_triglycerides: regress, smk /*hyp_tx dm_tx*/ cvdh: logit, edu: ologit) /* */ genmiss(m) cycles(10) m(20) replace seed(515200) trace(fc3) As you can see I'm trying to do 20 imputations but Stata stops after a few imputations (6, 7 or so) and produces the following message: "Warning: while I was executing the following command: uvis regress wc study_id log_age sex edu log_weight log_height log_hip log_sbp log_dbp hyp hyp_dx hyp_tx log_glucose dm dm_dx dm_tx log_tot_c log_hdl_c log_triglycerides smk fast cvdhis [pweight= sweight] if __000004, /// ( invalid name r(198);" I don't think this is a problem with the syntax or a type, because Stata fits the model several times and then stops. Moreover, I've used the exact same program, but a different seed to impute 20 copies (m=20) without problems. I hope someone could shed some light on what's going on. Thanks, VICTOR M. HERRERA MD. MS. Research Assistant - Wisconsin Diabetes Registry Population Health Sciences Department University of Wisconsin 610 Walnut St. 626 WARF Madison, WI 53726 (608) 265-3686 * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

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