We excluded all patients diagnosed with placentae previa, pathology of lower genital tract, patients who had bleeding disorders (i.e. maternal bleeding disorders unrelated to the effect of abruptio placentae) and those with missing record on abruptio placentae status (n = 511).
Among the patient records analyzed, the low proportion of missing variables (Table 1) is reassuring, but this does not exclude the possibility that additional patients were either not entered entirely or had inadequately coded problem and prescription lists, which could have led to missed records based on the range of keywords we used to extract data.
In Western Australia a total of 7619 notifications of STIs and BBVs were received in 2004, and data on Aboriginality was missing (recorded as 'unknown') in 26% of these notifications (Table 1).
"The moon is a great place to study geological processes and it nicely complements the missing geological record on the Earth," said Dr. Paul D. Spudis, a planetary scientist at Johns Hopkins's Applied Physics Laboratory.
Information on missing case records was recorded (age, sex, admitting specialty, reason why missing) to check for sampling bias.
The High Rise Bombers recorded two tracks, "She's Got It" and "Domestic Criminal", which appeared on The Melbourne Club, a 1981 compilation by various artists on Missing Link Records.
Records missing data on age or sex were excluded from the analysis (less than 0.1% of records).
But if current trends continue, borrowing may reach £42 billion, says the Institute for Fiscal Studies.Worse still for Mr Darling, his announcement about the missing benefit records came hard on the heels of another embarrassing statement about Northern Rock, a mortgage lender that has been propped up by public cash since its call for emergency help and a run by depositors in mid-September.
We excluded one record with missing information on sex and 123 records because they were restoration applications.
100 records had missing information on pregnancy planning, and 816 records had missing smoking information, leaving a total of 18,178 records with planning information and 17,462 records with smoking information.
