Table 2 Characteristics of participants in the study categorized by menarche age (N = 4770)
Variables |  ≤ 15 years |  ≥ 16 years | Total | χ2 | P |
|---|---|---|---|---|---|
N | 3068 | 1702 | 4770 | Â | Â |
Educational Status | Â | Â | Â | 107.805 | 0.000 |
 Illiteracy | 1438(46.87) | 564(33.14) | 2002(41.97) |  |  |
 less than grade school | 1470(47.91) | 960(56.4) | 2430(50.94) |  |  |
 Junior school | 121(3.94) | 128(7.52) | 249(5.22) |  |  |
 Above vocational institute | 39(1.27) | 50(2.94) | 89(1.87) |  |  |
Marriage Status | Â | Â | Â | 3.537 | 0.060 |
 Spinsterhood | 467(15.22) | 225(13.22) | 692(14.51) |  |  |
 Married | 2601(84.78) | 1477(86.78) | 4078(85.49) |  |  |
Place of abode | Â | Â | Â | 28.676 | 0.000 |
 Rural | 2043(66.59) | 1001(58.81) | 3044(63.82) |  |  |
 City | 1025(33.41) | 701(41.19) | 1726(36.18) |  |  |
Smoking habits | Â | Â | Â | 11.58 | 0.003 |
 No | 2804(91.4) | 1592(93.54) | 4396(92.16) |  |  |
 Being used to smoking | 75(2.44) | 19(1.12) | 94(1.97) |  |  |
 Current smoking | 189(6.16) | 91(5.35) | 280(5.87) |  |  |
Alcohol habits | Â | Â | Â | 3.504 | 0.173 |
 No | 2673(87.13) | 1514(88.95) | 4187(87.78) |  |  |
 Less than once per month | 165(5.38) | 76(4.47) | 241(5.05) |  |  |
 More than once per month | 230(7.5) | 112(6.58) | 342(7.17) |  |  |
Dietary habits | Â | Â | Â | 4.573 | 0.102 |
 less than 2 times per day | 385(12.55) | 242(14.22) | 627(13.14) |  |  |
 3 times per day | 2637(85.95) | 1443(84.78) | 4080(85.53) |  |  |
 more than 4 times per day | 46(1.5) | 17(1) | 63(1.32) |  |  |
Social events | Â | Â | Â | 11.259 | 0.001 |
 No | 1576(51.37) | 788(46.3) | 2364(49.56) |  |  |
 Yes | 1492(48.63) | 914(53.7) | 2406(50.44) |  |  |
Accidental history | Â | Â | Â | 1.445 | 0.229 |
 No | 2845(92.73) | 1594(93.65) | 4439(93.06) |  |  |
 Yes | 223(7.27) | 108(6.35) | 331(6.94) |  |  |
Exercises habits | Â | Â | Â | 0.379 | 0.827 |
 No exercise | 1873(61.05) | 1039(61.05) | 2912(61.05) |  |  |
 Less than regular exercise | 600(19.56) | 323(18.98) | 923(19.35) |  |  |
 Regular exercise | 595(19.39) | 340(19.98) | 935(19.6) |  |  |
Famine exposure | Â | Â | Â | 87.521 | 0.000 |
 No exposure | 425(13.85) | 361(21.21) | 786(16.48) |  |  |
 Fetal exposure | 348(11.34) | 263(15.45) | 611(12.81) |  |  |
 Childhood exposure | 1239(40.38) | 665(39.07) | 1904(39.92) |  |  |
 Adolescence/adult exposure | 1056(34.42) | 413(24.27) | 1469(30.8) |  |  |
Metabolic syndrome | Â | Â | Â | 13.557 | 0.000 |
 No | 1715(55.9) | 857(50.35) | 2572(53.92) |  |  |
 Yes | 1353(44.1) | 845(49.65) | 2198(46.08) |  |  |