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Table 2 Autism recurrence risk by interbirth interval

From: Recurrence rates provide evidence for sex-differential, familial genetic liability for autism spectrum disorders in multiplex families and twins

Group N Chi-squared P value Adjusted P value
All 332 10.41 1.25e−03 0.011*
Males 188 13.56 2.31e−04 2.08e−03*
Females 144 0.52 0.471 1
FC 129 2.7 0.100 0.903
MO 203 7.37 6.63e−03 0.060
FC, Males 75 1.69 0.194 1
FC, Fems 54 0.67 0.413 1
MO, Males 113 12.08 5.10e−04 4.59e−03*
MO, Fems 90 0.049 0.825 1
  1. Chi-squared statistics and P values are from the whole-model test for logistic regression of affection status of the first child born after the second affected child by the natural log of the interbirth interval (time since the birth of the second affected child) in months. Adjusted P values have been corrected for nine tests. *Adjusted P value ≤0.05. MO, male-only families; FC, female-containing families.