Table 2.

Node Definitions*

NumberNode NameValuesDefinition
1 NB options Nothing, PE, US, orthopaedic examination of at-risk infantOptions available at birth to the PCP
2 DDH in NB Present, absentTrue prevalence of DDH at birth
3 PE result in NB Positive, negativeResult of PCP's PE at NB
4 US result in NB Positive, negativeResult of US ordered by PCP at NB
5 Orthopaedic evaluation in NB Positive, negativeResult of orthopaedic evaluation of NB
6 Post-NB PE options PE 2 wk; immediate US; US 2 wk; immediate orthopaedic examination; orthopaedic examination 2 wkOptions after NB PE
7 Post-NB US options Immediate orthopaedic examination; delayed orthopaedic examinationOptions after NB US
8 Post-NB orthopaedic evaluation options PE 2 wk; US 2 wk; orthopaedic evaluation 2 wkOptions after NB orthopaedic evaluation
9 DDH at 2 wk Present, absentTrue prevalence of DDH at 2 wk
10 PE result at 2 wk Positive, negativeResult of PCP's PE at 2 wk
11 US result at 2 wk Positive, negativeResult of US ordered by PCP at 2 wk
12 Orthopaedic evaluation at 2 wk Positive, negativeResult of orthopaedic evaluation at 2 wk
13 Options after PE at 2 wk PE PE <4 mo; immediate US; delayed US; immediate orthopaedic examinationOptions after 2-wk PE
14 Options after US 2 wk Orthopaedic examination 2 wk; PE <4 moOptions after NB US
15 Options after orthopaedic examination 2 wk PE <4 mo; orthopaedic examination <4 moOptions after 2-wk orthopaedic evaluation
16 DDH <4 mo Present, absentTrue prevalence of DDH <4 mo (and after 2 wk)
17PE result <4 moPositive, negativeResult of PCP's PE <4 mo
18US result <4 moPositive, negativeResult of US ordered by PCP <4 mo
19Radiography result <4 moPositive, negativeResult of radiography (anteroposterior, “frog” position) <4 mo
20 Orthopaedic evaluation <4 mo Positive, negativeResult of orthopaedic evaluation <4 mo
21 Options after PE <4 mo PE <12 mo; immediate US; immediate radiographs; delayed radiographs; immediate orthopaedic evaluationOptions after PE <4 mo
22 Options after US <4 mo PE <12 mo; delayed radiographs; immediate orthopaedic evaluationOptions after US <4 mo
23 Options after radiography <4 mo PE <12 mo; delayed radiographs; immediate orthopaedic evaluationOptions after radiography <4 mo
24 Options after orthopaedic evaluation 4 mo PE <12 mo; orthopaedic evaluation <12 moOptions after orthopaedic evaluation <4 mo
25 DDH <12 mo Present, absentTrue prevalence of DDH <12 mo (and after 4 mo)
26PE result <12 moPositive, negativeResult of PCP's PE <12 mo
28Radiography result <12 moPositive, negativeResult of radiograph between 4 and 12 mo
29 Orthopaedic evaluation <12 mo Positive, negativeResult of orthopaedic evaluation <12 mo
30 DDH <18 mo Present, absentTrue prevalence of DDH >12 mo
31 Complications of treatment AVN present; AVN absentLate complications of treatment for DDH
  • * NB indicates newborn; PCP, primary care provider; US, ultrasonography.

  • Bold type indicates nodes for which the articles provided substantive evidence; italic type indicates unobservables (true DDH at any time epoch) or decision node; plain type indicates chance node with little evidence.