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Table 4 Regression Models for the effects of factor scores on age of diagnosis using 5 factor Varimax Rotation Model

From: Clinical signs associated with earlier diagnosis of children with autism Spectrum disorder

  (1) (2) (3) (4) (5)
Factor 1: Regressive Autism −2.43*** −2.01***   −1.77** −1.64**
  (0.66) (0.65)   (0.79) (0.78)
Factor 2: Social Awkwardness 0.53 −0.90   0.88 −0.69
  (0.73) (0.72)   (0.76) (0.76)
Factor 3: Communication Difficulties −15.7*** −13.5***   −15.3*** − 13.2***
  (0.70) (0.74)   (0.77) (0.79)
Factor 4: Sensory Reactivity & Need for Sameness −1.97*** −2.55***   −1.61** −2.34***
  (0.76) (0.74)   (0.80) (0.77)
Factor 5: Aggressive Behavior 7.46*** 6.25***   7.81*** 6.46***
  (0.73) −0.73   (0.76) (0.76)
Both Parents Graduated College   −4.04**    −4.07**
   (1.60)    −1.6
Only Mother Graduated College   0.52    0.48
   (1.78)    (1.78)
Only Father Graduated College   −3.65    −3.61
   (2.45)    (2.45)
Black   1.49    1.42
   (2.97)    (2.97)
Hispanic/Latino   3.20    3.24
   (1.97)    (1.97)
Other   3.02    3.06
   (3.46)    (3.46)
Family Income > $100,000   −1.45    −1.48
   (1.54)    (1.54)
Lived in Urban Area   −2.76    −2.76
   (1.79)    (1.79)
Asperger Diagnosis   10.9***    10.8***
   (1.84)    (1.85)
Year of Birth   −0.75***    −0.75***
   (0.10)    (0.10)
Number of Symptoms Reported    −0.97*** −0.31 −0.18
    (0.14) (0.21) (0.21)
Constant 46.7*** 1549*** 64.3*** 52.7*** 1553***
  (0.62) (202) (2.63) (4.12) (202)
Observations 1359 1330 1669 1359 1330
R-squared 0.327 0.387 0.030 0.328 0.387
  1. Each column reports the estimated coefficients of one regression
  2. Standard errors in parentheses
  3. *** p < 0.01, ** p < 0.05, * p < 0.1