Phase 1 follow-up diagnostic assessment sampling strategy, with study numbers
Sampling group | Observed Q-CHAT (missing items=0) | Maximum Q-CHAT (missing items=4) | % sampled | Total | Assessment numbers | ||
Selected | Invited | Agreed | |||||
1 | ≥38 | ≥44 | 100 | 86 | 86 | 74 | 40 |
2 | ≤37 | ≥44 | 50 | 21 | 10 | 9 | 6 |
3 | 41–43 | 41–43 | 50 | 61 | 31 | 28 | 16 |
4 | ≤40 | 41–43 | 50 | 21 | 10 | 8 | 5 |
5 | 38–40 | 38–40 | 25 | 129 | 31 | 28 | 20 |
6 | ≤37 | 38–40 | 25 | 25 | 5 | 5 | 2 |
7 | ≤37 | ≤37 | 1 | 3300 | 40 | 39 | 32 |
Total | 3643 | 213 | 191 | 121 |
Q-CHAT, Quantitative Checklist for Autism in Toddlers.