for equal sample size51. The hSNP2 values are all lower than those reported for height (0.45, 0.03 s.e.)39, but the estimates are in the same ballpark as those reported for other complex traits and diseases using the same quality control pipeline, such as for body mass index (BMI) (0.17, 0.03 s.e.)39, Alzheimer’s disease (0.24, 0.03 s.e.), multiple sclerosis (0.30, 0.03 s.e.) and endometriosis (0.26, 0.04 s.e.)40.