Table 4.

Comparison of environmental risk factors for speech-language delay

Factor	Study group (n=42)	Control group (n=42)	P
Trauma	1 (2.4%)	0	1.000***
Chronic noise exposure >65 db	9 (21.4%)	6 (14.3%)	0.393*
Television viewing >2 h	16 (38.1%)	15 (35.7%)	0.821*
Inadequate stimulation	26 (61.9%)	0	<0.001*

*Chi-square test; **Unpaired t-test; ***Fisher's exact test. Bold: P value < 0.05 is statistically significant