Table 3.
Stratum-Specific Likelihood Ratios for Cutoff Scores on the English and Spanish Versions of the Newest Vital Sign, Stratified by TOFHLA Score
| Number Correct on NVS-E | TOFHLA <75* | TOFHLA ≥ 75* | SSLR† | SSLR‡Grouped |
| English | ||||
| 0 | 9 | 8 | 6.1 | } 5.4 |
| 1 | 19 | 20 | 5.1 | |
| 2 | 5 | 25 | 1.1 | } 1.2 |
| 3 | 6 | 24 | 1.4 | |
| 4 | 0 | 49 | 0 | } 0 |
| 5 | 0 | 37 | 0 | |
| 6 | 0 | 48 | 0 | |
| Total | 39 | 211 | ||
| Spanish | ||||
| 0 | 38 | 32 | 2.2 | } 1.8 |
| 1 | 30 | 37 | 1.5 | |
| 2 | 17 | 34 | 0.9 | } 0.6 |
| 3 | 3 | 28 | 0.2 | |
| 4 | 0 | 15 | 0 | } 0 |
| 5 | 0 | 10 | 0 | |
| 6 | 0 | 6 | 0 | |
| Total | 88 | 162 | ||
NVS-E = Newest Vital Sign-English; TOFHLA = Test of Functional Health Literacy in Adults SSLR = stratum-specific likelihood ratio.
* 75 is the TOFHLA cut-off score below which individuals are considered to have marginal or inadequate literacy. Individuals with scores >75 are considered to have adequate literacy.
† Stratified by TOFHLA scores <75 (marginal or inadequate literacy) vs 75 (adequate literacy).
‡ SSLRs for detecting low literacy at each score on the NVS in English (1-A) and Spanish (1-B). Because of the similarity in SSLRs in adjacent groups, we suggest grouping scores into 3 categories: 0–1, 2–3, 4–6.