PTH and osteogenesis imperfecta: At 3 months, children with PTH-M did not differ significantly on cognitive symptoms compared with those with PTH-NM (EMD, 1.07; 95% CI, −0.55 to 2.69), those with no PTH (EMD, 1.96; 95% CI, 0.37 to 3.55), or those with OI (EMD, 1.99; 95% CI, 0.36 to 3.62) (Figure 1B).