Table 4: Unadjusted and adjusted associations between sociodemographic, health behavior and health related factors and PMS affective and somatic domains.

PMS affective domain# PMS somatic domain##
Unadjusted OR (95% CI) Adjusted OR (95% CI) Unadjusted OR (95% CI) Adjusted OR (95% CI)
Age, years [21-29] vs. [17-21] 0.99 (0.81; 1.23) - 1.20 (0.99; 1.46) -
Body mass index (BMI), kg/m2 < 18.5
18.5 - 25
25 - 30
>= 30
1.00
1.13 (0.83; 1.55)
1.04 (0.71; 1.52)
1.64 (0.96; 2.80)
 - 1.00
1.45 (1.11; 1.91)*
2.45 (1.71; 3.51)*
2.46 (1.52; 3.96)*
 1.00
1.43 (1.08; 1.90)*
2.16 (1.49; 3.12)*
2.01 (1.22; 3.29)*
Smoking status Smokers vs. non-smokers and ex-smokers 1.06 (0.83; 1.36) - 0.99 (0.79; 1.23) -
Age at menarche, years >= 12 vs. < 12 0.93 (0.74; 1.16) - 0.84 (0.69; 1.03) -
Family profile Dead (1 or both) vs. alive 1.14 (0.69; 1.87) - 3.29 (1.79; 6.06)* 2.61 (1.38; 4.94)*
Mother education University vs. high school or below 1.02 (0.82; 1.26) - 0.88 (0.73; 1.07) -
Mother occupation Employed vs. housewife 1.03 (0.82; 1.29) - 1.06 (0.87; 1.30) -
Mother income/month None
US$ < 2000 		1.00
0.99 (0.78; 1.27) 		- 1.00
1.12 (0.90; 1.40) 		-
US$ >= 2000 1.17 (0.77; 1.79) 0.90 (0.63; 1.29)
Father education University vs. high school or below 1.04 (0.83; 1.30) - 0.83 (0.68; 1.01) -
Father occupation Employed vs. unemployed 0.80 (0.51; 1.26) 0.51 (0.33; 0.80)*
Father income/month None
US$ < 2000 		1.00
0.76 (0.48; 1.20) 		- 1.00
0.49 (0.31; 0.77)* 		1.00
0.65 (0.40; 1.05)
US$ >= 2000 0.85 (0.54; 1.35) - 0.54 (0.34; 0.85)* 0.66 (0.41; 1.08)
Living conditions Dorms
With parents
Others
 2.00
0.89 (0.69; 1.15)
0.80 (0.46; 1.37)
 - 1.00
0.77 (0.61; 0.98) *
1.04 (0.62; 1.77) 		1.00
0.82 (0.64; 1.05)
1.00 (0.58; 1.73)
University Private vs. public 1.01 (0.82; 1.25) - 1.19 (0.98; 1.44) -
Major Sciences & Medical
Humanities & Business
Engineering 		1.00
1.52 (1.20; 1.93)*
0.92 (0.70; 1.21) 		-
1.47 (1.16; 1.88)*
0.90 (0.68; 1.19) 		1.00
1.04 (0.84; 1.28)
0.87 (0.67; 1.13) 		-
Exercise/week >= 3 times vs. < 3 times 0.83 (0.65; 1.06) - 0.97 (0.77; 1.22) -
Caffeine consumption None
1 cup/day
2-3 cups/day
>= 3 cups/day 		1.00
1.51 (1.18; 1.94)*
2.10 (1.61; 2.73)*
20.59 (5.03; 84.3)* 		1.00
1.50 (1.16; 1.93)*
2.03 (1.55; 2.66)*
16.6 (3.89; 71.0)* 		1.00
1.24 (0.99; 1.56)
1.58 (1.24; 2.00)*
3.35 (1.86; 6.02)* 		1.00
1.33 (1.05; 1.68)*
1.46 (1.14; 1.86)*
2.70 (1.43; 5.08)*
Energy drink consumption None
1 drink/day
2-3 drinks/day
>= 3 drinks/day 		1.00
0.89 (0.66; 1.20)
1.21 (0.60; 2.42)
2.56 (1.10; 5.99)* 		1.00
0.82 (0.60; 1.11)
0.93 (0.45; 1.91)
0.79 (0.30; 2.06) 		1.00
0.82 (0.60; 1.11)
0.93 (0.45; 1.91)
0.79 (0.30; 2.06) 		1.00
0.78 (0.59; 1.03)
1.32 (0.66; 2.65)
0.95 (0.43; 2.09)
Calcium supplements Yes vs. No 1.03 (0.77; 1.37) - 0.91 (0.71; 1.18) -
Vitamin D supplements Yes vs. No 0.90 (0.70; 1.16) - 0.97 (0.77; 1.22) -
Contraceptive pills Yes vs. No 1.16 (0.86; 1.57) - 1.38 (1.05; 1.82)* 1.29 (0.97; 1.71)
Medication used for Pain, Yes vs. No
Nausea, Yes vs. No
Vomiting, Yes vs. No
Sleeping pills, Yes vs. No 		1.96 (1.59; 2.42)*
1.69 (1.24; 2.31)*
1.75 (1.23; 2.50)*
2.95 (1.48; 5.89)* 		1.70 (1.36; 2.13)*
1.22 (0.83; 1.80)
1.10 (0.71; 1.70)
1.95 (0.95; 4.01) 		1.44 (1.19; 1.73)*
1.88 (1.42; 2.49)*
1.82 (1.33; 2.49)*
2.53 (1.45; 4.41)* 		1.24 (1.01; 1.51)*
1.46 (1.03; 2.07)*
1.11 (0.75; 1.63)
1.75 (0.98; 3.15)

*P-values < 0.05.
#PMS affective domain includes the following symptoms: Depression, anxiety, angry outbursts, irritability, confusion or the thought to commit suicide during the five days preceding menses in each of the three prior menstrual cycles; ##PMS somatic domain includes the following symptoms: Breast tenderness, swelling of extremities, abdominal bloating, fluid retention or headache during the five days preceding menses in each of the three prior menstrual cycles.