Stock D L, Streissguth A P, Martin D C
Early Hum Dev. 1985 Jan;10(3-4):273-8. doi: 10.1016/0378-3782(85)90058-1.
A quantitative neonatal sucking measure and a clinical neonatal sucking measure were significantly related to one another, but only the quantitative measure was significantly related to prenatal alcohol and nicotine exposure. The clinical measure did not provide adequate precision to warrant its recommendation as an outcome variable at moderate exposure levels.