Table 2.
Month-specific total number of non-national births, multiple sclerosis births, estimates of expected relative incidence, observed relative incidence (ORI) and ORI ranks: Kuwait, January 1, 1950 – April 30, 2013
| Months | Non-national births (n = 997269) | MS births (n = 237) | Expected relative incidence (×10 3 ) | Observed relative incidence (×10 3 ) | ORI rank |
|---|---|---|---|---|---|
| Jan |
86425 |
18 |
0.020184 |
0.017689 |
5 |
| Feb |
74731 |
22 |
0.018231 |
0.022583 |
10 |
| Mar |
81849 |
17 |
0.020184 |
0.01764 |
4 |
| Apr |
80364 |
28 |
0.019533 |
0.028637 |
12 |
| May |
82865 |
15 |
0.020184 |
0.015374 |
2 |
| June |
80451 |
14 |
0.019533 |
0.014303 |
1 |
| July |
84331 |
17 |
0.020184 |
0.017121 |
3 |
| Aug |
83502 |
20 |
0.020184 |
0.020342 |
8 |
| Sept |
83339 |
20 |
0.019533 |
0.019725 |
7 |
| Oct |
86868 |
24 |
0.020184 |
0.023465 |
11 |
| Nov |
84524 |
22 |
0.019533 |
0.021393 |
9 |
| Dec | 88020 | 20 | 0.020184 | 0.019298 | 6 |