Developmental Screening and Recommendations for 18-Month-Old Children

Developmental Screening

The American Academy of Pediatrics recommends formal standardized developmental screening at 18 months using a validated tool, such as the Ages and Stages Questionnaire or PEDS, as clinical observation alone misses approximately 45% of children eligible for early intervention 1, 2
Acceptable validated tools for developmental screening include the Ages and Stages Questionnaire (ASQ) and Parents' Evaluation of Developmental Status (PEDS) 1, 2

At 18 months, a child is expected to sit, stand, and walk independently, and grasp and manipulate small objects, with absence of these skills signifying delay requiring further evaluation 1, 2

The American Academy of Pediatrics recommends autism-specific screening at 18 months using the Modified Checklist for Autism in Toddlers (M-CHAT), which has a lower positive predictive value at 16-23 months compared to 24-30 months 4
The M-CHAT has a high positive predictive value (0.98) for any developmental disorder 5

The American Academy of Family Physicians recommends conducting a risk assessment to determine if hematocrit or hemoglobin screening is needed at 18 months, in addition to universal screening at 12 months 4

The American Academy of Family Physicians recommends instrument-based screening at 18 months to assess risk, though routine visual acuity screening is typically performed at ages 3-5 years 4

The American Academy of Family Physicians recommends applying fluoride varnish from 6 months through 5 years of age to address dental caries 4

The Centers for Disease Control and Prevention recommends reviewing and updating immunizations according to their schedule, with the fourth dose of DTaP given between 15-18 months if not already administered 5

The American Academy of Pediatrics recommends discussing transition from bottle to cup, which should be completed by 12 months, and providing age-appropriate guidance on sleep patterns and dental care 5

Any child failing standardized developmental screening requires referral to early intervention programs, and children with absent expected motor milestones need further evaluation 3
For abnormal muscle tone findings, increased muscle tone warrants brain MRI and decreased muscle tone warrants serum creatine kinase measurement 3
The American Academy of Pediatrics recommends not delaying referral to early intervention while pursuing diagnostic workup, as these should occur concurrently 6
For premature infants, correct for gestational age by subtracting weeks born early from chronological age through at least 24 months when assessing development 5