Table 1 Reproductive history among LN cases and lupus cases without nephritis stratified by current age (females only)
From: Differing environmental risk factors for membranous versus proliferative lupus nephritis
| Â | Ages 18 to 34 (n= 127) | Â | |
|---|---|---|---|
Age at menarche | All LN cases ( n = 64) | Lupus cases without nephritis ( n = 63) | OR (95% CI) |
8 to 9 | 5 (8) | 3 | 1.84 (0.35 to 9.62) |
10 | 3 | 7 (11) | 0.54 (0.11 to 2.65) |
11 | 5 (8) | 8 (13) | 0.58 (0.15 to 2.29) |
12 | 11 (17) | 18 (29) | 0.76 (0.27 to 2.18) |
13 | 18 (28) | 19 (30) | 1.00 (referent) |
14 | 7 (11) | 4 | 1.54 (0.34 to 6.93) |
15 | 9 (14) | 2 | 4.94 (0.88 to 27.92) |
16 | 5 (8) | 2 | 3.57 (0.56 to 22.73) |
17 to 18 | 1 | 0 | - |
Trend test (P value) | Â | Â | (0.03) |