Table 5.

Planned and actual accrual data in registry (Data Source: ClinicalTrials.gov, N = 1988).

Accrual data	Descriptive summary
Target enrolment/anticipated enrolment *
Min, Max	30, 800000
Median (Q1–Q3)	440 (224–1200)
Frequency Missing	91
Actual enrolment *
Min, Max	60, 933789
Median (Q1–Q3)	413.5 (216.25–1146.50)
Frequency Missing	268
Accrual Ratio (actual/target enrolment) *
Min, Max	0.1, 4.8
Median (Q1–Q3)	1.0 (0.9–1.0)
Frequency Missing	306
Ratio thresholds (N = 1682)	N (%)
<0.5 (i.e., less than 50% of target enrolment achieved)	83 (4.9%)
0.5 to <0.85	274 (16.3%)
0.85 to <1.15	1082 (64.3%)
1.15 to <1.5	141 (8.4%)
≥1.5 (i.e., more than 150% of target enrolment achieved)	102 (6.1%)

^*Extreme outliers that were clearly erroneous have been set to missing.