Table 2 Comparison of clinical, pregnancy-related and current mood variables between the PP and No PME groups
|  | PP (n = 284)1 | No PME (n = 268)1 | PP versus No PME | |
|---|---|---|---|---|
Z-score | P-value | |||
Age at illness onset, years | ||||
 Median | 22 | 30 |  |  |
 IQR (range) | 10 (9–39) | 19 (7–68) | −6.86 | < 0.001 |
Number of episodes of mania | ||||
 Median | 5 | 4 |  |  |
 IQR (range) | 7 (1–100) | 5 (1–100) | −1.63 | 0.10 |
Number of episodes of depression | ||||
 Median | 5 | 5 |  |  |
 IQR (range) | 8 (0–100) | 8 (0–100) | −0.35 | 0.73 |
Number of pregnancies | ||||
 Median | 2 | 2 | −0.35 | 0.73 |
 IQR (range) | 1 (1–8) | 1 (1–11) |  |  |
Number of deliveries | ||||
 Median | 2 | 2 |  |  |
 IQR (range) | 1 (1–6) | 1 (1–8) | −1.23 | 0.22 |
First episode postpartum, n (%) | ||||
 Yes | 124 (44.9) | – |  |  |
 No | 152 (55.1) | – | – | – |
Beck Depression Inventory Score | ||||
 Median | 7 | 9 |  |  |
 IQR (range) | 13 (0–50) | 15 (0–55) | −1.51 | 0.130 |
Altman Mania Scale score | ||||
 Median | 2 | 3 |  |  |
 IQR (range) | 4 (0–18) | 5 (0–16) | −2.87 | 0.004 |