Table 3.

Sociodemographic information of the SIP sample by group (categorical variables).

Characteristic	Intervention (n = 170)		Control (n = 173)
	n	%	n	%
CHILD GENDER
Male	87	51.18	90	52.02
Female	83	48.82	83	47.98
HEALTH HISTORY
With history of medical illnessa	5	2.94	3	1.73
Without history of medical illness	165	97.06	170	98.27
FREQUENCY OF TRAINING SESSION
Once a week	139	81.80	120	69.40
Twice a week	31	18.20	53	30.60

^aLow weight at birth, premature, neurological, and/or perinatal disorders.