Utilization Variables (OBNUM. RXNUM) The variables OBNUM, OPNUM, HHNUM, IPNUM, ERNUM, and RXNUM indicate the total number of 2015 events that can be linked to each condition record on the current file, i.e., office- based, outpatient, home health, inpatient hospital stays, emergency room visits, and prescribed medicines, respectively. These counts of events were derived from Expenditure Event Public Use Files (HC-178G, HC- 178F, HC-178H, HC-178D, HC-178E, and HC-178A). Events associated with conditions include all utilization that occurred between January 1, 2015 and December 31, 2015. Because persons can be seen for more than one condition per visit, these frequencies will not match the person or event-level utilization counts. For example, if a person had one inpatient hospital stay and was treated for a fractured hip, a fractured shoulder, and a concussion, each of these conditions has a unique record in this file and IPNUM=1 for each record. By summing IPNUM for these records, the total inpatient hospital stays would be three when actually there was only one inpatient hospital stay for that person and three conditions were treated. These variables are useful for determining the number of inpatient hospital stays for head injuries, hip fractures, etc.
Utilization Variables (OBNUM. RXNUM) The variables are OBNUM, OPNUM, HHNUM, DVNUM, HSNUM, ERNUM, and RXNUM indicate the total number of 1997 medical provider events that can be linked to each condition record on the current file for each event type, i.e., office-based, outpatient, home health, dental, hospital stays, emergency room visits and prescribed medicines, respectively. These counts of events were derived from Medical Provider Event Public Use Files (HC-016A, HC- 016B, and HC-016D- HC-016H). Medical provider events associated with conditions include all utilization that occurred between January 1, 1997 and December 31, 1997. Because persons can be seen for more than one condition per visit, these frequencies will not match the person- or event-level utilization counts. For example, if a person had one hospital stay and was treated for a fractured hip and a fractured shoulder and a concussion, each of these conditions has a unique record and HSNUM=1 for each record. If you sum HSNUM for these records, then the total hospital stays would be 3 when actually there was only 1 hospital stay for that person and 3 conditions were treated. These variables are useful if you wanted to know the number of hospital stays for head injuries, hip fractures, etc.
Utilization Variables (OBNUM
