Table 2.
LP, standard deviation, and LP ratios resulting from different recall periods
| control group | intervention group | ||||
|---|---|---|---|---|---|
| Model/recall method | mean LP | SD | mean LP | SD | LP ratio |
| Model scenario 1 (LS) | |||||
| 1 day point prevalence recall | 0.6% | 1.5% | 0.5% | 1.2% | 0.80 |
| 3 day point prevalence recall | 0.5% | 1.3% | 0.4% | 1.1% | 0.80 |
| 7 day point prevalence recall | 0.4% | 1.0% | 0.3% | 0.8% | 0.80 |
| 7 day period prevalence recall | 1.6% | 3.2% | 1.3% | 2.7% | 0.81 |
| Model scenario 2 (LL) | |||||
| 1 day point prevalence recall | 1.3% | 3.2% | 1.0% | 2.7% | 0.80 |
| 3 day point prevalence recall | 1.2% | 2.9% | 0.9% | 2.4% | 0.80 |
| 7 day point prevalence recall | 1.0% | 2.4% | 0.8% | 2.0% | 0.80 |
| 7 day period prevalence recall | 2.4% | 5.0% | 1.9% | 4.2% | 0.82 |
| Model scenario 3 (HS) | |||||
| 1 day point prevalence recall | 5.4% | 7.3% | 4.2% | 5.9% | 0.80 |
| 3 day point prevalence recall | 4.9% | 6.5% | 3.9% | 5.2% | 0.80 |
| 7 day point prevalence recall | 4.0% | 5.2% | 3.2% | 4.2% | 0.80 |
| 7 day period prevalence recall | 13.9% | 13.9% | 11.5% | 11.8% | 0.84 |
| Model scenario 4 (HL) | |||||
| 1 day point prevalence recall | 11.0% | 13.1% | 8.9% | 11.1% | 0.80 |
| 3 day point prevalence recall | 10.1% | 11.9% | 8.1% | 10.1% | 0.80 |
| 7 day point prevalence recall | 8.2% | 9.7% | 6.6% | 8.2% | 0.80 |
| 7 day period prevalence recall | 19.3% | 18.7% | 16.0% | 16.3% | 0.82 |
Simulated were 2000 individuals allocated to intervention and control group, with a 20% LP reduction in the intervention group (LP ratio= 0.8).