Level of attendance at the English National Health Service Diabetes Prevention Programme and risk of progression to type 2 diabetes

Table 3 Weibull survival model of number of DPP sessions attended and risk of progression to type 2 diabetes

	Hazard ratio associated with progression to type 2 diabetes between 12 months from referral and 31st March 2020
	Unadjusted	Adjusted
Attended 2 sessions	1.005	1.020
	[0.864,1.169]	[0.876,1.187]
Attended 3 sessions	0.880	0.881
	[0.756,1.023]	[0.755,1.027]
Attended 4 sessions	0.978	0.976
	[0.851,1.124]	[0.845,1.126]
Attended 5 sessions	0.849^*	0.879
	[0.730,0.988]	[0.754,1.026]
Attended 6 sessions	0.842^*	0.886
	[0.723,0.980]	[0.760,1.034]
Attended 7 sessions	0.723^***	0.782^**
	[0.615,0.849]	[0.664,0.921]
Attended 8 sessions	0.684^***	0.749^***
	[0.581,0.807]	[0.633,0.886]
Attended 9 sessions	0.663^***	0.755^***
	[0.565,0.780]	[0.641,0.891]
Attended 10 sessions	0.571^***	0.680^***
	[0.486,0.669]	[0.577,0.801]
Attended 11 sessions	0.504^***	0.630^***
	[0.433,0.587]	[0.538,0.737]
Attended 12 sessions	0.405^***	0.511^***
	[0.345,0.475]	[0.433,0.602]
Attended 13 sessions	0.419^***	0.545^***
	[0.352,0.498]	[0.455,0.652]
Observations	51,803	51,803

Coefficients are hazard ratios. 95% confidence intervals in brackets. The regression model in column 2 includes participant characteristics, coefficients are presented in additional materials Table S1. The regression model in column 2 also includes fixed effects for programme provider, NHS England Region and referral month. ^* p < 0.05, ^** p < 0.01, ^*** p < 0.001

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