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THE BATH AS PATIENT
GLOBAL SCORE (BAS-G)
..............................................................................(Jones
et al, 1996)
The BAS-G is essentially an objective way of asking the question:
“How have you been over the last
x months?”
Jones et al (1996) argue that the BAS-G reflects the effect
of AS on the patients well being.
The BAS-G consists of two questions which ask patients’
to indicate, on a 10cm visual analog scale, the effect the disease
has had on their well being over the
......– last week
......– last six months.
The mean of the two scores gives a BAS-G score of 0 –
10 (refer to page 13). The higher the score, the greater the
perceived effect of the disease on the patient’s well
being.
With a sample of 177 inpatients and 215 patients reached by
a postal survey, the authors found that:
- BAS-G scores covered the whole 0 – 10 scale for both
time frames (1 week & 6 months).
- BAS-G correlated well with both BASDAI and BASFI.
This suggests that disease activity and functional ability
play a major role in patients’ well being – more
than metrology.
- Of the 5 BASDAI items, spinal pain followed by fatigue correlated
best with BAS-G. This highlights the importance of pain and
fatigue to the patient.
- BAS-G demonstrated statistically significant (p<0.001)
sensitivity to change.
.............................................................................(Jones
et al, 1996)
The authors acknowledged that BAS-G cannot stand alone, and
should be one element of a complete assessment. However, an
index of this type provides a numerical value to the patient’s
sense of well being. This allows for comparison between consultations,
especially when patients may not necessarily be seen by the
same clinician on each occasion.
The authors conclude that they have formalized and validated
a simple question frequently asked (Jones et al, 1996).
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