Table 1.

Pooled relative risks of bleeding events and pregnancy loss

Outcome	No. of studies	RR (95% CI) Random effects; I2
Bleeding
Enoxaparin vs placebo/controls	5	1.35 (0.88–2.07); I2 = 16.05
Enoxaparin vs aspirin	3	0.93 (0.62–1.39); I2 = 0
Enoxaparin + aspirin vs aspirin	4	0.95 (0.71–1.28); I2 = 11.28
Pregnancy loss
Enoxaparin vs placebo/controls	6	0.58 (0.34–0.96); I2 = 65.80
Enoxaparin vs aspirin	4	0.39 (0.15–1.01); I2 = 78.24
Enoxaparin + aspirin vs aspirin	8	0.42 (0.32–0.56); I2 = 14.10
Enoxaparin + aspirin vs UFH + aspirin	2	0.66 (0.33–1.34); I2 = 0