Table 2.
LENA counts and their rate ratios for Recording 2 versus Recording 1 for the 8 low-visit and 14 high-visit infants with both recordings.
| Event type | Recording 1 x̅ ± SD (median) |
Recording 2 x̅ ± SD (median) |
Rate ratio (R2:R1) (95% CI) |
p |
|---|---|---|---|---|
| High-visit hours of recording |
203 hours Infant N = 14 |
|||
| High-visit parent-care time | ||||
| Hours, N (%) | 54/203 (27) | 42/203 (21) | ||
| AWC | 1644 ± 1852 (1002) | 1888 ± 1882 (1368) | 1.39 (0.99–1.94) | 0.06 |
| Conversations | 10 ± 10 (7) | 13 ± 18 (7) | 1.33 (0.92–1.92) | 0.13 |
| Vocalizations | 24 ± 23 (17) | 26 ± 32 (16) | 1.20 (0.85–1.69) | 0.3 |
| Low-visit hours of recording |
110 hours Infant N = 8 |
|||
| Cuddler time | ||||
| Hours, N (%) | 17/110 (15) | 13/110 (12) | ||
| AWC | 1609 ± 1786 (894) | 2530 ± 2025 (1956) | 1.33 (0.68–2.59) | 0.41 |
| Conversations | 7 ± 7 (5) | 13.7 ± 13 (8.0) | 1.49 (0.64–3.45) | 0.35 |
| Vocalizations | 12 ± 12 (11) | 24.5 ± 22 (11.0) | 1.38 (0.57–3.33) | 0.47 |
| Low-visit parent-care time | ||||
| Hours, N (%) | 4/110 (4) | 4/110 (4) | ||
| AWC | 1649 ± 861 (1496) | 995 ± 1055 (763) | 0.69 (0.29–1.63) | 0.4 |
| Conversations | 13 ± 10 14) | 5.8 ± 8.6 (0) | 0.39 (0.10–1.55) | 0.18 |
| Vocalizations | 40 ± 36 (35) | 13.4 ± 16 (4) | 0.29 (0.07–1.10) | 0.07 |
AWC adult word count, Conversations conversational turns, Vocalizations child vocalizations.