TABLE 3.
Checking dimension with anxiety disorders and checking dimension with obsessive-compulsive related disorders: best-fitting models and standardized parameters
| Estimated parameter |
Fit statistic |
||||||||
|---|---|---|---|---|---|---|---|---|---|
| Model | Common factors | Specific factors | −2LL | df | AIC | χ2 | Δdf | P value | |
| Checking, social phobia, panic, and generalized anxiety disorder | |||||||||
| 1 Cholesky saturated | ACE | ACE | 22,792.9 | 9,938 | 2,916.95 | - | - | - | |
| 2 IP | ACE | AE | 22,800.4 | 9,948 | 2,904.43 | 7.48 | 10 | .68 | |
| Checking, body dysmorphic, and hoarding disorder | |||||||||
| 1 Cholesky saturated | ACE | ACE | 6,568.7 | 7,458 | −8,347.24 | - | - | - | |
| 2 IP | ACE | AE | 6,569.5 | 7,461 | −8,352.51 | 0.727 | 3 | .87 | |
| Standardized parameters for each best-fitting model number 2 (95% CI) | |||||||||
| Additive genetic (A) |
Shared environment (C) |
Nonshared environment (E) |
|||||||
| Common | Specific | Total A | Common | Specific | Total C | Common | Specific | Total E | |
| SP | 0.26(0.10–0.38) | 0.14(0.003–0.21) | 0.40(0.25–0.47) | 0.01 (0.00–0.14) | - | 0.01(0.00–0.14) | 0.29 (0.23–0.36) | 0.29 (0.24–0.34) | 0.59(0.52–0.65) |
| PD | 0.25(0.06–0.36) | 0.02 (0.00–0.08) | 0.27(0.10–0.36) | 0.03 (0.00–0.17) | - | 0.03(0.00–0.17) | 0.39(0.31–0.48) | 0.31 (0.25–0.36) | 0.70 (0.63–0.78) |
| GAD | 0.14(0.02–0.26) | 0.13 (0.00–0.18) | 0.27 (0.12–0.38) | 0.05(0.00–0.17) | - | 0.05(0.00–0.17) | 0.28(0.21–0.36) | 0.39(0.34–0.45) | 0.68 (0.61–0.75) |
| Checking | 0.08(0.00–0.56) | 0.03 (0.00–0.36) | 0.11 (0.00–0.64) | 0.41 (0.00–0.59) | - | 0.41 (0.00–0.59) | 0.14(0.06–0.24) | 0.34(0.23–0.47) | 0.48 (0.33–0.63) |
| BDD | 0.37(0.12–0.44) | 0.00 (0.00–0.24) | 0.37(0.29–0.44) | 0.001 (0.00–0.05) | - | 0.001 (0.0–0.05) | 0.06(0.02–0.12) | 0.57 (0.50–0.65) | 0.63 (0.56–0.70) |
| HD | 0.06(0.03–0.25) | 0.25(0.005–0.32) | 0.31 (0.18–0.38) | 0.0005(0.0–0.11) | - | 0.0005(0.00–0.11) | 0.49(0.25–0.75) | 0.19(0.00–0.43) | 0.68 (0.62–0.75) |
| Checking | 0.26(0.07–0.56) | 0.00(0.00–0.18) | 0.26(0.07–0.56) | 0.31 (0.06–0.51) | - | 0.31(0.06–0.51) | 0.15(0.06–0.32) | 0.27(0.13–0.41) | 0.42 (0.30–0.56) |
−2LL, minus twice the log-likelihood; df, degrees of freedom; AIC, Akaike information criterion; χ2, difference in goodness-of-fit statistic between the submodel and the full model; Δdf, change in degrees of freedom between the submodel and the full model; A, additive genetic factor; C, shared environmental factor; E, nonshared environmental factor; IP, independent pathway; CI, confidence intervals; HD, hoarding disorder symptoms; BDD, body dysmorphic disorder symptoms; PD, panic disorder symptoms; GAD, generalized anxiety disorder symptoms; SP, social phobia disorder symptoms.
At the bottom of the table is presented the standardized parameters for each best-fitting model (checking + ADs and checking + OCRDs). Total A, C, and E do not sum to 1 due to rounding. Each parameter can be multiplied by 100 to obtain the percentage (e.g., SP shows 40% of total A, 1% of total C, and 59% of total E).