Table 1. Comparison of cases included for analysis versus missing cases.

Variables	Followed up		Missing		Statistica	p- value
	n	%	n	%
Race					1.354	0.508
Malay	100	51.0	49	47.1
Chinese	60	30.6	30	28.8
Indian and others	36	18.4	25	24.0
Gender					0.765	0.382
Male	60	30.6	37	35.6
Female	136	69.4	67	64.4
Education level					0.638	0.888
Primary or	95	48.5	52	50.0
Secondary
Certificate	18	9.2	7	6.7
Diploma	30	15.3	15	14.4
Degree/Postgraduate	53	27.0	30	28.8
Comorbidities					0.004	0.949
Yes	69	35.2	37	35.6
No	127	64.8	67	64.4
Family history					0.918	0.632
Yes	54	27.6	26	25.0
No	124	63.2	71	68.3
Unsure	18	9.2	7	6.7
TaqI					0.693	0.707
T/T	139	70.9	78	75.0
T/C	44	22.4	21	20.2
C/C	13	6.6	5	4.8
ApaI					0.123	0.940
A/A	41	20.9	20	19.2
A/C	75	38.3	41	39.4
C/C	80	40.8	43	41.4
Anxious worrying					0.75	0.386
High tendency	51	26.6	21	21.9
Low tendency	141	73.4	75	78.1
Irritability					2.963	0.085
High tendency	25	13.0	20	20.8
Low tendency	167	87.0	76	79.2
Social avoidance					1.169	0.280
High tendency	16	8.4	12	12.4
Low tendency	175	91.6	85	87.6
Interpersonal					0.097	0.755
sensitivity	57	30.5	31	32.3
High tendency	130	69.5	65	67.7
Low tendency
Self-criticism					0.629	0.428
High tendency	140	72.9	65	68.4
Low tendency	52	27.1	30	31.6
Effectiveness					0.129	0.719
High tendency	60	33.3	29	31.2
Low tendency	120	66.7	64	68.8
Mean Age, years (sd)	196	38.9 (13.01)	104	38.5 (11.93)	0.228*	0.820

^a The statistic reported for all variables was the chi-square value, except the variable labelled * (t-statistic)