Strategies for assessing the impact of loss to follow-up on estimates of neurodevelopmental impairment in a very preterm cohort at 2 years of age

Table 4 Estimated prevalence of neurodevelopmental impairment under different MNAR scenarios

	delta	exponential(delta)	Portugal	UK	Total
Crude prevalence			16.5 [13.1;20.5]	20.0 [16.6;24.0]	18.4 [15.9;21.2]
MAR scenario			17.4 [13.4;21.4]	21.9 [17.9;26.0]	20.4 [17.3;23.4]
MNAR scenario	−0.2	0.8	16.3 [12.5;20.0]	20.5 [16.6;24.3]	19.0 [16.2;21.8]
	−0.1	0.9	16.6 [12.7;20.5]	21.0 [17.3;24.7]	19.5 [16.6;22.3]
	0.1	1.1	17.5 [13.5;21.5]	22.9 [18.6;27.6]	21.0 [18.0;24.1]
	0.2	1.2	18.0 [13.9;22.1]	23.7 [19.4;28.0]	21.7 [18.7;24.8]
	0.3	1.4	18.7 [14.5;22.9]	25.1 [20.5;29.7]	22.9 [19.4;26.3]
	0.4	1.5	19.0 [15.0;23.0]	26.1 [21.3;30.8]	23.6 [20.1;27.1]

ISSN: 1471-2288