Table 5.

Frequency of Miscarriage at Less Than 12 Weeks Gestational Age by Cranial and/or Spinal Radiation Among Female Cancer Survivors

Treatment	Female Participants (n = 1,915)
	Total No.	Miscarriage	Rate Ratio	95% CI	P
No RT	1,147	120	1.00	—	—
Cranial + spinal RT	110	9	0.87	0.43 to 1.76	.7032
Cranial RT only	499	61	1.27	0.89 to 1.82	.1922
Spinal RT only	5	0	—	—	—
No cranio-spinal RT	1,483	117	0.75	0.56 to 1.02	.0684
Unknown	785	86	1.09	0.78 to 1.53	.6031

Abbreviation: RT, radiation therapy.