Name Small for Gestational Age Rate Short/Other Names SGA Description Crude rate for small for gestational age (SGA) Interpretation The in-hospital SGA rate represents the proportion of singleton babies born in a Canadian hospital with a birth weight below the 10th percentile for their gestational age and sex. In other words, babies classified as SGA are smaller than 90% of the babies from a standard reference population of the same gestational age and sex. Lower rates for this indicator are desirable. HSP Framework Dimension Health System Outcomes: Improve health status of Canadians Areas of Need Not applicable Geographic Coverage All provinces/territories Reporting Level/Disaggregation National, Province/Territory, Region Indicator Results https://apps.cihi.ca/mstrapp/asp/Main.aspx?Server=apmstrextprd_i&project=Quick%20Stats&uid=pce_pub_en&pwd=&evt=2048001&visualizationMode=0&documentID=029DB170438205AEBCC75B8673CCE822
Identifying Information
 Name Small for Gestational Age Rate Short/Other Names SGA
Indicator Description and Calculation
 Description Crude rate for small for gestational age (SGA) Calculation: Description Rate = (Number of live singleton newborns classified as SGA at birth) ÷ (Number of live singleton newborns with a valid birth weight, gestational age and gender) × 100 Unit of Analysis: Discharges from acute care facilities Calculation: Geographic Assignment Place of residence Calculation: Type of Measurement Rate - Per 100 Calculation: Adjustment Applied None Calculation: Method of Adjustment Not applicable Denominator Description: Number of live singleton newborns with a valid birth weight, gestational age and gender Inclusions: 1. ICD-10-CA in-hospital singleton birth code: a. A diagnosis code of Z38.0 coded in any position Exclusions: 1. Non-newborn records 2. Cadaveric donors 3. Invalid birth weight (Weight = blank, 0000, 0001 or ZZZZ) 4. Invalid or out-of-range gestational age (Delivery Gestational Age = blank or ZZ or <22 weeks or >43 weeks) 5. Gender Code not equal to F or M 6. ICD-10-CA multiple births codes: a. Any newborn record (Entry Code = N with a Z38 diagnosis code) where two or more newborn records are born to the same mother (duplicate Maternal Newborn Chart Number) within 40 days of one another (based on Admission Date) in the same institution (Institution Number) OR b. Any one ICD-10-CA multiple birth diagnosis code of Z38.3, Z38.4, Z38.5, Z38.6, Z38.7 or Z38.8 coded in any diagnosis field 7. ICD-10-CA abortion or other out-of-hospital birth codes: a. Any one diagnosis code of P96.4, Z38.1 or Z38.2 coded in any diagnosis field Numerator Description: Number of live singleton newborns classified as SGA at birth Inclusions: 1. Weight <10th percentile for gestational age and gender category. Standard Canadian birth weights for gestational age by gender charts were used (M. S. Kramer et al., 2001). Exclusions: Same as denominator (numerator is a subset of the denominator)
Background, Interpretation and Benchmarks
 Rationale SGA rates continue to vary among provinces/territories. Given this variance, this indicator can be used to inform government planners, policy-makers, health system decision-makers, health care providers, patients and the general public. It can help raise awareness and allow Canada to compare its rates with the rates of other countries. Interpretation The in-hospital SGA rate represents the proportion of singleton babies born in a Canadian hospital with a birth weight below the 10th percentile for their gestational age and sex. In other words, babies classified as SGA are smaller than 90% of the babies from a standard reference population of the same gestational age and sex. Lower rates for this indicator are desirable. HSP Framework Dimension Health System Outcomes: Improve health status of Canadians Areas of Need Not applicable Targets/Benchmarks Not applicable References Kramer MS, Platt RW, Wen SW, et al. A new and improved population-based Canadian reference for birth weight for gestational age. Pediatrics. 2001;108(2):e35. http://www.pediatrics.org/cgi/content/full/108/2/e35.
Availability of Data Sources and Results
 Data Sources DAD, HMDB, MED-ÉCHO Available Data Years Type of Year: Fiscal First Available Year: 2007 Last Available Year: 2017 Geographic Coverage All provinces/territories Reporting Level/Disaggregation National, Province/Territory, Region