Table 3: Behavioral state scores for preterm infants before and after the intervention of 5 days ( 𝑁 = 9 0 ; Yakson 𝑛 = 3 0 ; GHT 𝑛 = 3 0 ; control 𝑛 = 3 0 ).

Group1day2day3day4day5day
Mean(SD)Mean (SD)Mean (SD)Mean (SD)Mean (SD)

Behavioral stateYakson
 Before9.51 (2.09)9.65 (1.54)9.30 (2.31)9.05 (2.41)8.98 (2.10)
 After2.51 (1.41)3.16 (1.37)3.26 (1.62)2.93 (1.41)2.38 (1.08)
GHT
 Before8.15 (2.62)8.06 (3.26)8.58 (2.77)8.26 (2.60)8.25 (2.51)
 After2.70 (1.95)2.51 (1.64)2.86 (1.82)3.33 (1.78)3.10 (1.55)
control
 Before8.73 (1.98)9.41 (1.58)8.95 (2.07)11.46 (9.21)8.41 (2.46)
 After9.70 (1.05)9.53 (1.31)9.36 (1.37)9.90 (.73)9.06 (1.38)