Levonorgestrel emergency contraception and bodyweight: are current recommendations consistent with historic data?

Figures & data

Figure 1. Body mass index (BMI) versus bodyweight (BW) in non-pregnant and pregnant SDR and DDR subjects. Dashed lines indicate FSRH double dose recommendation cut points on the BMI and BW scales. SDR, single dose recommended; DDR, double dose recommended.

Figure 2. Body mass index (BMI) versus bodyweight (BW) in non-pregnant and pregnant SDR and DDR subjects with outlier observations excluded. Dashed lines indicate FSRH double dose recommendation cut points on the BMI and BW scales. SDR, single dose recommended; DDR, double dose recommended.

Figure 3. Body mass index (BMI) versus bodyweight (BW) in non-pregnant and pregnant SDR and DDR subjects. Dashed line indicates ASEC double dose recommendation cut point on the BMI scale. SDR, single dose recommended; DDR, double dose recommended.

Figure 4. Body mass index (BMI) versus bodyweight (BW) in non-pregnant and pregnant SDR and DDR subjects with outlier observations excluded. Dashed line indicates ASEC double dose recommendation cut point on the BMI scale. SDR, single dose recommended; DDR, double dose recommended.

Table 1. Pregnancy proportions (%) and risk ratios (RR) for SDR (single dose recommended) and DDR (double dose recommended) subjects in subsamples defined by DDR criteria and outlier inclusion.

DDR criteria by	Outliers	SDR subjects	DDR subjects	RR [95% CI]	p Value
FSRH	included	53/4751 = 1.12%	6/1108 = 0.54%	0.49 [0.21; 1.13]	.0947
FSRH	excluded	53/4746 = 1.12%	2/1053 = 0.19%	0.17 [0.04; 0.70]	.0024
ASEC	included	56/5603 = 1.00%	3/256 = 1.17%	1.17 [0.37; 3.72]	.7432
ASEC	excluded	55/5584 = 0.98%	0/215 = 0.00%	0.00 [ N/A ]	.2697