Sleep Health in Infancy and Early Childhood

income_mom

Household annual income (9-level)

Maternal reported

• 1: Less than $10,000
• 2: $10,000- $19,999
• 3: $20,000- $29,999
• 4: $30,000- $39,999
• 5: $40,000- $59,999
• 6: $60,000- $79,999
• 7: $80,000- $99,999
• 8: $100,000-$199,999
• 9: More than $200,000
• 10: Refused

choices