Together, seven conditions account for more than two-thirds (68.6%) of the main conditions that cause activity limitations among children under 18 years. These conditions, shown in the chart below, include respiratory diseases (mainly asthma), mental retardation, mental disorders, speech impairments, nervous system diseases, hearing impairments, and orthopedic impairments.
Boys have higher rates of mental disorders and speech impairments, and slightly higher rates of respiratory diseases and mental retardation. In contrast, girls show higher rates of nervous system diseases, hearing impairments, and orthopedic impairments.
Data Table for Figure 7
Source: LaPlante & Carlson (1996), Table 6a, pp. 95-104.
Surveys: NHIS, 1992