Table 1:

Characteristics of participating infants

CharacteristicNo. (%)*p value
Placebo control
n = 88
Video
n = 89
Video–sucrose
n = 88
Video–sucrose–lidocaine
n = 87
At study entry
Male sex46 (52)51 (57)51 (58)44 (51)0.7
White49 (56)52 (58)n = 87
49 (56)
51 (59)0.9
No. of siblings0.8 (0.7)0.8 (0.7)n = 87
0.7 (0.7)
0.6 (0.7)0.2
At 2 mo(n = 87)(n = 89)(n = 87)(n = 87)
Postnatal age, d, mean ± SD64.5 ± 8.263.6 ± 6.865.0 ± 8.164.3 ± 5.80.7
Weight, kg, mean ± SD5.5 ± 1.0n = 87
5.5 ± 0.7
n = 85
5.5 ± 1.2
5.6 ± 1.30.8
At 4 mon = 82n = 78n = 79n = 75
Postnatal age, d, mean ± SD128.2 ± 9.7126.5 ± 9.4129 ± 11.4128.3 ± 11.70.5
Weight, kg, mean ± SDn = 80
7.0 ± 1.5
n = 77
6.9 ± 0.9
n = 78
6.8 ± 1.2
6.9 ± 0.80.9
At 6 mon = 81n = 75n = 79n = 74
Postnatal age, d, mean ± SD191.8 ± 11.2191.0 ± 15.8193.7 ± 15.1192.5 ± 14.30.7
Weight, kg, mean ± SDn = 80
7.8 ± 1.2
n = 74
8.1 ± 1.9
7.7 ± 1.0n = 73
7.9 ± 0.9
0.2
At 12 mon = 76n = 75n = 77n = 71
Postnatal age, d, mean ± SD378.4 ± 17.5376.52 ± 14.3374.9 ± 12.8378.9 ± 31.20.6
Weight, kg, mean ± SD9.5 ± 1.4n = 74
9.8 ± 1.4
n = 78
9.5 ± 1.3
n = 70
9.9 ± 1.3
0.3
  • Note: SD = standard deviation.

  • * Unless otherwise specified.