Table 2.
Cosinor analyses of DDH births in Indiana
n | Periodicity | r 2 | p value | M | A | ϕ | Month | |
---|---|---|---|---|---|---|---|---|
All | 424 | 7 | 0.70 | 0.005 | 33.61 | 11.45 | 122 | Mar 13, Oct 12 |
VD | 204 | 7 | 0.75 | 0.002 | 16.11 | 5.88 | 125 | Mar 15, Oct 14 |
CS | 183 | 7 | 0.69 | 0.005 | 14.38 | 5.86 | 117 | Mar 10, Oct 9 |
Breech | 125 | 8 | 0.57 | 0.023 | 9.92 | 3.19 | 44 | Jan 30, Sep 30 |
Vertex | 259 | 7 | 0.86 | <0.001 | 20.23 | 9.00 | 132 | Mar 19, Oct 18 |
Unilateral | 281 | 7 | 0.71 | 0.004 | 22.36 | 7.05 | 118 | Mar 11, Oct 10 |
Bilateral | 140 | 8 | 0.43 | 0.079 | 10.74 | 4.30 | 100 | Mar 9, Nov 7 |
Left | 208 | 6 | 0.67 | 0.007 | 17.34 | 4.17 | 174 | Mar 29, Sep 28 |
Right | 72 | 7 | 0.54 | 0.032 | 5.61 | 2.72 | 110 | Mar 6, Oct 5 |
Pavlik | 260 | 7 | 0.61 | 0.014 | 20.39 | 8.46 | 132 | Mar 19, Oct 18 |
Operative | 126 | 10 | 0.56 | 0.025 | 10.30 | 2.16 | 340 | Oct 15 |
Live births in Indiana | 698,390 | 11 | 0.60 | 0.017 | 58,417.00 | 505.10 | 226 | 29-July |
VD vaginal delivery, CS cesarean section, M mesor, A amplitude, ϕ acrophase, Month acrophase of cosinor analysis converted to month