Access to general practice and visits to accident and emergency departments in England: cross-sectional analysis of a national patient survey

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Figure 1
Relative weighted frequencies of responses and branching structure of questions in the GP Patient Survey, 2012–2013.

Table 1

Sensitivity analysis of estimated number of relevant A&E attendances in England in 2012–2013 (millions)

Estimated number of general practice consultations in England, 2012–2013	Ratio of relevant A&E attendances to general practice consultations in GPPS sample, 2012–2013
	*X₁0.75 0.01252**	*X₁0.9 0.01503**	X₁ 0.01669	*X₁1.1 0.01836**	*X₁1.25 0.02087**
^a303 900 000	3.805	4.566	5.074	5.581	6.342
X₂345 600 000	4.327	5.193	5.770^c	6.347	7.212
^b387 300 000	4.849	5.819	6.466	7.112	8.082

The unit of the estimates provided is millions of A&E attendances. X₁: the bootstrapped mean ratio of relevant A&E attendances to general practice consultations in the GP Patient Survey (GPPS) sample (to 4 significant figures). X₂: the estimated number of general practice consultations in England in 2012–2013, based on a simple linear regression of national data for 2000–2001 to 2008–2009¹⁰ (to 4 significant figures).
↵a The number of general practice consultations previously estimated for England in 2008–2009.¹¹
↵b The number of general practice consultations estimated for 2012–2013 based on a doubling of the difference between 303.9 million and 345.6 million.
↵c 99.9% CI = 5.49 to 6.05 million.