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Table 7 Utility of chiropractors’ prediction of patients not improving as categorised by PGIC* scores split by complaint

From: Prognostic accuracy of clinicians for back, neck and shoulder patients in routine practice

 

Back

Neck

Shoulder

Week 4

   

N

173

45

37

OR (95% CI)

1.1 (0.5 to 2.5)

4.0 (0.9 to 17.8)

1.3 (0.3 to 5.2)

Nagelkerke R2

0.00

0.10

0.00

+ve Likelihood ratio

0.0

2.8

0.0

−ve Likelihood ratio

**

0.7

**

AUC

0.5 (0.4 to 0.6)

0.6 (0.4 to 0.8)

0.5 (0.3 to 0.7)

Week 12

   

N

124

35

23

OR (95% CI)

2.2 (0.8 to 6.1)

0.5 (0.05 to 4.9)

0.5 (0.04 to 5.5)

Nagelkerke R2

0.03

0.02

0.02

+ve Likelihood ratio

0.0

0.0

0.0

−ve Likelihood ratio

**

**

**

AUC

0.6 (0.4 to 0.7)

0.5 (0.3 to 0.8)

0.6 (0.3 to 0.8)

  1. *(≤ 5 points), **unable to calculate as divided by 0, AUC=Area under curve.