Appendix 2

Simple correlations of demographic variables, satisfaction with opening hours, and demand for additional opening hours (study group n = 596)

Proportion satisfied with opening hours 2008/2009Proportion want extra hours 2008/2009Practice list sizeIndex of Multiple DeprivationQuality and Outcomes Framework scoreProportion of patients >45 years old 2008/2009Proportion of graduate doctorsChange in satisfaction with opening hours 2008/08GPPS response rate 2007/2008GPPS response rate 2008/2009
Satisfied 2008/20091.00
Want extra hours 2008/2009-0.741.00
practice size-
QOF score0.100.000.21-0.111.00
Proportion patient >45 years0.19-0.230.15-0.430.191.00
Proportion UK graduate doctors0.020.020.31-0.310.160.321.00
Change in satisfaction0.38-0.15-0.05-
Response rate 2007/20080.19-0.200.26-0.620.280.830.400.101.00
Response rate 2008/20090.20–0.200.28–0.580.270.790.390.090.911.00
  • Statistical significance of relationships: If r is over ±0.08, P is <0.05. If r is over ±0.20, P is <0.0001. However, when clustered at PCT level (robust): If r is over ±0.23, P<0.001, otherwise not significant. Relevance of relationships: If r is less than ±0.30 (weak) in italic font, if r is over ±0.60 (strong) in bold font. No material differences were found repeating the regressions after log-transformation of the variables to correct for skew of the residuals.