Table 3 Complication risk association with potential complication group using Muhtaseb et al's scoring system.

Risk group (potential complication score)		Complication risk (95% CI)
1 (0)		0.64% (0.48 to 0.86%)
2 (1–2)		0.72% (0.46 to 1.10%)
3 (3–5)		4.35% (2.64 to 6.71%)
4 (⩾6)		Not calculable