Table 2.

Average treatment-free interval (TFI) given platinum treatment and the most recent TFI.

Median (95% CI) treatment free interval (PFI) given platinum treatment and the previous PFI.

First Re-treatment Months previous PFI	<7.4	7.4–15.7	>15.7
# Intervals
Platinum	19	19	25
Non-platinum	59	12	9
Median (95% CI)
Platinum	4.1 (1.9–12.2)	4.6 (3.5–13.5)	6.1 (3.4–12.6)
Non-platinum	1.1 (0.9–2.3)	1.2 (0.8-NA)	1.0 (0.7-NA)
Log-rank Test	p=0.0263	p=0.0003	p=0.0018
Later Re-treatment Months previous PFI	<7.4	7.4–15.7	>15.7
# Intervals
Platinum	8	9	3
Non-platinum	46	15	5
Median (95% CI)
Platinum	3.6 (1.2-NA)	2.6 (0.9-NA)	3.4 (3.2-NA)
Non-platinum*	1.0 (0.9–1.2)	2.2 (1.0–8.8)	0.7 (0.7-NA)
Log-rank test	p=0.1450	p=0.7640	p=0.0136

Log-rank p-values test platinum vs. non-platinum TFI in a given stratum.

NA: indicates n upper bound that cannot be evaluated.

^*significant difference across PFI levels, p=0.0363.