Table 4∙.
Dyadic growth curve model examining the effects of couple-level discordant conditions on wives’ and husbands’ functional disability
| Parameter | Wives | Husbands | ||||||
|---|---|---|---|---|---|---|---|---|
| b | SE | IRR | 95% CI | b | SE | IRR | 95% CI | |
| Step 1 | ||||||||
| Time | 0.14*** | 0.01 | 1.15 | 1.13, 1.17 | 0.14*** | 0.01 | 1.15 | 1.13, 1.18 |
| Age | 0.05*** | 0.003 | 1.05 | 1.05, 1.06 | 0.05*** | 0.003 | 1.06 | 1.05, 1.06 |
| Minority status | 0.16*** | 0.03 | 1.18 | 1.12, 1.24 | 0.06* | 0.03 | 1.06 | 1.01, 1.12 |
| Education in years | −0.06*** | 0.01 | 0.94 | 0.93, 0.95 | −0.07*** | 0.01 | 0.94 | 0.93, 0.95 |
| Actor Number of chronic conditions | 0.16*** | 0.04 | 1.17 | 1.08, 1.26 | 0.31*** | 0.04 | 1.37 | 1.27, 1.47 |
| Partner Number of chronic conditions | 0.08* | 0.03 | 1.08 | 1.01, 1.15 | 0.15*** | 0.03 | 1.16 | 1.08, 1.24 |
| Actor Depressive symptoms | 0.21*** | 0.01 | 1.23 | 1.21, 1.25 | 0.23*** | 0.01 | 1.26 | 1.23, 1.28 |
| Partner Depressive symptoms | 0.03* | 0.01 | 1.03 | 1.01, 1.05 | 0.04*** | 0.01 | 1.04 | 1.03, 1.06 |
| Actor Discordant conditions | 0.32*** | 0.02 | 1.38 | 1.32, 1.43 | 0.24*** | 0.02 | 1.27 | 1.22, 1.32 |
| Partner Discordant conditions | −0.02 | 0.02 | 0.98 | 0.94, 1.02 | 0.01 | 0.02 | 1.01 | 0.97, 1.05 |
| Couple Discordant conditions | 0.11*** | 0.03 | 1.11 | 1.06, 1.17 | 0.13*** | 0.02 | 1.13 | 1.08, 1.19 |
| QICC | 51281.84 | |||||||
| Step 2 | ||||||||
| Time X Actor Discordant conditions | −0.01 | 0.01 | 0.99 | 0.98, 1.01 | 0.01 | 0.01 | 1.01 | 0.99, 1.02 |
| Time X Partner Discordant conditions | 0.01 | 0.01 | 1.01 | 0.99, 1.02 | −0.003 | 0.01 | 1.00 | 0.98, 1.01 |
| Time X Couple Discordant conditions | −0.02* | 0.01 | 0.98 | 0.96, 1.00 | −0.01 | 0.01 | 0.99 | 0.98, 1.01 |
| QICC | 51271.44 | |||||||
| Step 3 | ||||||||
| Actor Discordant conditions X Actor Depressive symptoms | 0.01 | 0.01 | 1.01 | 0.99, 1.03 | 0.004 | 0.01 | 1.00 | 0.98, 1.02 |
| Partner Discordant conditions X Actor Depressive symptoms | 0.02** | 0.01 | 1.02 | 1.01, 1.04 | 0.01 | 0.01 | 1.01 | 0.99, 1.03 |
| Couple Discordant conditions X Actor Depressive symptoms | −0.03** | 0.01 | 0.97 | 0.95, 0.99 | −0.003 | 0.01 | 1.00 | 0.98, 1.02 |
| QICC | 51263.34 | |||||||
| Step 4 | ||||||||
| Time X Actor Discordant conditions X Actor Depressive symptoms | 0.01** | 0.003 | 1.01 | 1.00, 1.02 | 0.01 | 0.004 | 1.01 | 1.00, 1.01 |
| Time X Partner Discordant conditions X Actor Depressive symptoms | 0.000 | 0.003 | 1.00 | 0.99, 1.01 | 0.002 | 0.004 | 1.00 | 0.99, 1.01 |
| Time X Couple Discordant conditions X Actor Depressive symptoms | 0.003 | 0.004 | 1.00 | 1.00, 1.01 | 0.01 | 0.004 | 1.01 | 1.00, 1.02 |
| QICC | 50957.55 |
Note. Estimates are presented from each step in the analysis. Step 4 also included two-way interaction terms (time X actor depressive symptoms and time X partner depressive symptoms).
IRR incidence rate ratio; CI confidence interval; QICC Corrected Quasi-likelihood under Independence Model Criterion.
N = 3,991 couples. *p < .05. **p < .01. ***p < .001.